What this page will and will not give you. It will not give you a price. A price for a 60 x 48 sliding window is a function of at least six inputs, and a single number printed without them is either a guess or a description of a different product. What it gives you instead is the arithmetic that tells a real quotation from a plausible one, and the six lines you have to close before any number means anything.
Everything below comes from published sources that you can check: a retail listing for a nominal 60 x 48 single slider, a manufacturer size chart that separates the hole from the opening, an aluminium window series that publishes its own limits, and our own catalogue. Where we do the arithmetic ourselves, we say so and we give you the assumption so you can ｒｅｐｌａｃｅ it.
Three things have to be true before a window has a price, and none of them is in the phrase people type into a search box.
First, the phrase does not name one product. It names a size that at least five different numbers answer to, and only one of those numbers is the thing you receive. Second, a sliding window is sold as a unit and used as an opening, and those two areas are not proportional to each other. Third, the number is quoted against a configuration, a quantity, a currency, a delivery term and a date, and every one of those can move it further than the size does.
This is why price pages for this size are so confident and so useless. They are not lying. They are answering a question you did not ask, about a window you have not finished specifying.
Here is the same window described five ways, with the source for each one. The last column is the one that costs money.
| What it is called | The number as published | In millimetres | What it is actually for | What happens if you order the wrong one |
|---|---|---|---|---|
| Nominal call size | 60 x 48 in | Not a physical dimension | A trade name used to order and to file products | You send a factory a name instead of a dimension and get whatever their interpretation is |
| Rough opening, convention A | 60 x 48 in | 1524 x 1219 | The hole the builder leaves, per one retail listing | The two published conventions differ by about 3 mm, which is more than the fitting tolerance most installers work to |
| Rough opening, convention B | 59 7/8 x 47 7/8 in | 1521 x 1216 | The hole, per one manufacturer size chart | Same problem, other direction; both are called 60 x 48 |
| Actual frame size | 59 x 47 in | 1499 x 1194 | What you receive, per the same retail listing | This is the only number that belongs on a purchase order |
| Net clear opening | 25 13/16 x 42 5/16 in | 656 x 1075, about 0.70 sq m | The hole you can actually pass air or a person through | This is what a bedroom window is legally measured on, and it is about 38 per cent of the hole |
Now the part that nobody prints. One published retail listing for a nominal 60 x 48 single slider states a rough opening of 60 x 48 inches and an actual window size of 59 x 47 inches. The name contains an inch that the window does not.
Convert the name literally and you get 1524 x 1219 millimetres. Convert the window and you get 1499 x 1194 millimetres. If you send a factory the literal conversion, you have just ordered twenty-five millimetres of width and twenty-five millimetres of height that no one in the trade makes, and twenty-five millimetres is larger than the fitting allowance in almost every installation detail ever drawn.
Take the inch off and something nicer appears. The actual frame of a nominal 60 x 48 is 1499 x 1194 millimetres. The metric modular size that a metric catalogue will sell you without thinking about it is 1500 x 1200 millimetres. The difference is about one millimetre in width and about six in height. A stock North American 60 x 48 and a stock metric 1500 x 1200 are, to within a few millimetres, the same window. Everything that makes a 60 x 48 expensive outside North America is the inch.
Most size guides print one number per size. One manufacturer of egress sliders prints four: the rough opening, the light surface of the glass, the light surface counted twice for two lites, and the vent surface. That last column is the one that matters, because it is the only published figure for what the window actually does.
| Call size | Rough opening, sq ft | Total glass, both lites, sq ft | Net clear opening, sq ft | Opening as a share of the hole, per cent | What that means when you compare prices |
|---|---|---|---|---|---|
| 48 x 48 | 15.92 | 11.95 | 5.82 | 36.6 | The smallest hole gives the smallest share of opening |
| 48 x 60 | 19.91 | 15.30 | 7.47 | 37.5 | Taller buys height of opening, not width |
| 60 x 36 | 14.92 | 11.16 | 5.43 | 36.4 | Lowest share in the chart, from a very wide and very short unit |
| 60 x 48 | 19.91 | 15.51 | 7.58 | 38.1 | Seven and a half square feet of opening out of twenty square feet of hole |
| 60 x 60 | 24.90 | 19.87 | 9.74 | 39.1 | The best share in the chart, and still under forty per cent |
| 72 x 48 | 23.90 | 19.07 | 9.35 | 39.1 | Same share as 60 x 60 from a smaller hole, because the lites get wider |
Read the last column from top to bottom. Across six sizes on one published chart, the share of the hole that opens never leaves the band between thirty-six and thirty-nine per cent. The hole grows by about two thirds between the smallest and the largest row. The share moves by less than three percentage points.
A bigger sliding window does not buy a bigger share of opening. It buys the same share of a bigger hole. Which means that the thing you are actually shopping for at 60 x 48 is seven and a half square feet, and the thing you are being invoiced for is twenty.
Every price page we have looked at quotes a rate against one of four areas: the rough opening, the outside of the frame, the visible glass, or the whole order. Not one quotes it against the only area a window is for, which is the part that opens.
Take a rate and divide it by 19.91 square feet of hole. Then take the same rate and divide it by 7.58 square feet of opening. The second number is about two point six times the first. Neither is wrong. They answer different questions, and the one you actually have, which is what an openable square foot costs, is the one that never gets printed.
That factor of two point six is not a curiosity. It turns up as an outright error on a widely circulated sliding window size guide, which states that a 60 x 48 gives twenty square feet of opening area when fully opened. Twenty square feet is the size of the hole. The opening on the published chart is seven point five eight square feet. The same factor of about two point six, arriving as a fact instead of a denominator, and it would put a bedroom window roughly two and a half times over the requirement it was sized to meet.
For reference, the two figures most often printed for a minimum net clear opening in a bedroom are five point seven and five point zero square feet, and which one applies depends on the floor level and on your authority having jurisdiction. A 60 x 48 at seven point five eight square feet clears both comfortably, which is exactly why this size is so often specified for bedrooms. Ask the authority, not the catalogue. See our own page on sliding window cost for the longer version of why the unit misleads.
If you collect quotes for several sizes from one factory, the rate per square metre will fall as the window grows. That is arithmetic, not generosity, and the table below shows why.
| Call size | Window area, sq m | Frame perimeter, m | Metres of frame per square metre of window | What it does to the rate |
|---|---|---|---|---|
| 36 x 24 | 0.557 | 3.05 | 5.47 | More than five metres of frame around half a square metre of window |
| 48 x 36 | 1.114 | 4.27 | 3.83 | The rate drops by about a third for no reason other than geometry |
| 60 x 48 | 1.858 | 5.49 | 2.95 | Roughly three metres of frame buys a square metre of window |
| 60 x 60 | 2.323 | 6.10 | 2.62 | Same width, more height, cheaper per unit of area |
| 72 x 60 | 2.787 | 6.71 | 2.41 | Less than half the frame per unit of area of the smallest row |
Extrusion, machining, corner assembly, sealing and most of the hardware are bought and worked by length, not by area. Glass is bought by area. So a window that is twice as large does not need twice the frame, and the rate per unit of area falls on its own.
The consequence for a buyer is blunt: a rate per square metre taken from a 72 x 60 and applied to a 60 x 48 is not a discount being withheld from you, it is a different product. Compare rates only between identically sized, identically configured units, or you are comparing geometry rather than suppliers.
Nobody thinks of 60 x 48 as a large window. It is the second most common slider size in several published popularity lists. So it is worth knowing that one published aluminium sliding window series prints these limits for itself: a maximum sash height of 1500 millimetres, a maximum sash width of 1200 millimetres, a maximum double glazed thickness of 18 millimetres, and a maximum sash weight of 40 kilograms.
A 60 x 48 in a two panel layout has a moving sash of roughly 762 by 1150 millimetres, which clears both of those dimensions easily. The weight is where it stops being easy. The table below is our own arithmetic, with the assumptions stated so you can change them.
| Glass build-up | Total glass thickness, mm | Glass weight, kg per sq m | Glass in one sash, kg | Sash with frame, about kg | Share of the published 40 kg ceiling, per cent |
|---|---|---|---|---|---|
| 5 + 12A + 5 | 10 | 25 | 15.3 | 23 | 58 |
| 6 + 12A + 6 | 12 | 30 | 18.4 | 26 | 66 |
| 5 + 9A + 5 + 9A + 5 | 15 | 37.5 | 22.9 | 31 | 77 |
| 8 + 12A + 8 | 16 | 40 | 24.5 | 33 | 83 |
Our assumptions, so you can ｒｅｐｌａｃｅ them: the moving sash is 762 by 1150 millimetres; the sash profile takes 75 millimetres off each edge, leaving a glass area of about 0.61 square metres; glass weighs about 2.5 kilograms per square metre per millimetre of total glass thickness; the aluminium sash frame adds about 8 kilograms. Change the sash profile and the numbers move. The shape of the result does not.
At a size nobody calls large, ticking the better glass box moves you from roughly six tenths to roughly eight tenths of a published ceiling. That is the real content of the glass decision at 60 x 48. It is not a thermal decision with a weight side effect; it is a weight decision with a thermal benefit. And nobody will tell you where the ceiling is, because almost nobody publishes one.
Because sash weight turns out to matter at this size, it is worth looking at how the industry publishes it. Here are five figures we found in print, all in kilograms, all describing something called the load a sliding sash can carry.
| Published figure | The words used around it | Whose page it is on | What it appears to count | Why it cannot be compared directly |
|---|---|---|---|---|
| 40 kg | Maximum sash weight | One aluminium sliding window series, Australia | The whole sash, evidently, since it sits next to a maximum sash size | The tightest published figure we found, and the only one that reads like a design limit |
| 80 / 100 / 120 kg, custom | Load bearing capacity | One aluminium window supplier listing | Not stated | Three values on one page and no statement of what any of them counts |
| 200 kg | Load bearing pulleys | ALPES TS130 side press window | The pulley set | A component rating, not a sash rating; the sash may be limited long before the pulley is |
| 220 kg | Single sash driving capacity | ALPES SL112/167 sliding door | A door sash, and the ability to move it rather than to hold it up | It is on a door, and driving is not the same measurement as carrying |
| 400 kg | Twenty wheel self balancing pulley | ALPES SL155 sliding door | A door sash carried on twenty wheels | Ten times the smallest figure, on a product that is not a window |
The largest is ten times the smallest. They are printed in the same unit, in the same industry, and most of them are answering different questions. We publish three of these five ourselves, and we will say plainly that putting 200, 220 and 400 in a descending column, as if they were a ranking, is the single most common way our own catalogue gets misread.
If a quotation hands you one of these numbers without saying which question it answers, you have been given a number, not an answer. At 60 x 48 the useful question is not how much the pulley carries. It is what the largest sash this series will accept, at this glass build-up, with this hardware.
Here is the honest reason a 60 x 48 sliding window has no single price. When a supplier prints a number, these six things have usually been assumed on your behalf, and each of them can move the number further than any difference between two suppliers does.
| Decision | What the quotation silently assumed | What it does to the price | What it does after handover | What to write instead |
|---|---|---|---|---|
| Which number is 60 x 48 | That the call size is the frame size | Stock at one factory, made to order at another, for the same window | A unit that is 25 mm larger than the hole, or 25 mm smaller | Frame size 1499 x 1194 mm; rough opening to be confirmed by others in writing |
| Which panel moves | That a handed unit exists as stock | Low, until it has to be changed, then total | Handing is cut into the profile. If it is wrong the window opens towards the thing you put in front of it | XO, operable panel on the left, viewed from outside; photograph the wall |
| Panel count | Two panels | A third panel adds a sash, a track run and machining | More hardware to maintain, and in most layouts a smaller single clear opening | Two panels; net clear opening to be stated in millimetres on the drawing |
| Glass build-up | The thinnest build-up that meets the local code | Medium, and it is the cheapest medium you will ever be offered | Sets sash weight, which sets roller life, and sets condensation and noise for the life of the building | Build-up written out, coating surface named, fill named, spacer named |
| Screen | None, or a screen on whichever side suits the factory | Low to medium | It is the part that wears first and the part most often omitted from the spare parts list | Mesh type, which side, and whether it can be removed without tools |
| Colour and coating batch | One standard colour, one batch | Low now, and a second colour or a custom match adds a batch charge | A replacement sash in five years without a batch number is a different colour | Colour name, single batch for the whole order, batch number on the packing list |
Notice that two of the six, handing and the identity of the number, cost nothing to get right and cannot be fixed after cutting. Those are the two to check twice. Everything else is a trade you can make deliberately instead of by accident.
Suppliers are not shy about what they sell, but very few list it line by line. One aluminium window supplier does, and the list is worth reading because of what is missing from it. These are the eight lines that one published aluminium window kit prints as included.
| Line printed as included | Is it normally in a factory quotation for a finished window | Who usually supplies it if it is not |
|---|---|---|
| Aluminium extrusions to make the window | Yes | Not applicable |
| Glazing rubbers to suit the glass thickness required | Yes | Not applicable |
| Mohair for the sashes | Yes | Not applicable |
| Components to fabricate the window | Yes | Not applicable |
| Gaskets | Yes | Not applicable |
| Key lock with one key | Usually, and one key is worth noting when you have forty windows | Not applicable |
| Frame screws | Yes, and the material of these screws is a corrosion decision, not a small part | Not applicable |
| Flat packed with clear wrap | Packaging is a line, not a given; crating is usually a separate one | Not applicable |
| Glass, which is not on the list at all | Sometimes, and whether it is decides whether your quote is comparable with anyone else's | A local glassier, or the factory, and the two are not the same price or the same warranty |
| Perimeter seal, sill pan, flashing, fixings into the building | Almost never | The installer, and this is the line that decides who answers the phone when it leaks |
Glass is not on that list. Neither is the perimeter seal, the sill pan, the flashing, the fixings into the building, or anything that happens after the crate is opened. At 60 x 48, where the hole is roughly twice the opening, the things that happen after the crate is opened are not a rounding error.
One more thing that belongs in this section. A delivery term is a scope statement, not a shipping detail. FOB, CIF and DDP each move a different set of costs and a different set of risks across the same line, and only one of them is a price. If a quotation does not name its term, it has not told you what it is quoting.
One aluminium window supplier publishes its standard sliding window sizes as 1200 by 1500, 1500 by 1800 and 1800 by 2100 millimetres, with custom sizes available up to 3000 by 2700. Look at the orientation. All three of those standard sizes are portrait: taller than they are wide.
A 60 x 48 is landscape, at roughly 1499 by 1194. On that supplier's list it is not a standard size. On a North American retail list it is the second most common slider made. The same window is a stock item on one list and a made to order item on another, and the difference shows up in the number and in the lead time, not in the window.
So the question to ask is not whether a 60 x 48 is standard. It is whether it is standard on the list you are buying from, and what happens to the price and the lead time if it is not. Two suppliers can quote you the same window with different lead times for no reason you will ever be told, and this is usually why.
There is a third number that no window name contains, and at 60 x 48 it is the one that decides whether the job is easy. It is how deep the wall is.
The published jamb depth of one stock 60 x 48 single slider is four and nine sixteenths inches, which is about 116 millimetres. The frame wall width of the ALPES TS130 side press window is 130 millimetres. Fourteen millimetres.
Fourteen millimetres is the difference between a window that sits in the wall and a window that makes you change the wall. It is smaller than the thickness of the render on most buildings, and it is larger than the tolerance most window schedules allow. It is also the one dimension that a factory cannot fix for you, because it belongs to the building.
State it in the enquiry, from the outside face inwards, layer by layer: cladding, cavity, sheathing, framing, insulation, plasterboard. That sentence costs nothing and prevents the single most common reason a correct window becomes a wrong one.
You have a finite amount of attention and a finite amount of negotiating room. This is where to spend them at 60 x 48 specifically, not in general.
| Decision | How far it moves the number | How far it moves the outcome | Where to spend your effort |
|---|---|---|---|
| Glass build-up | Medium | High, because it sets sash weight, condensation and noise at the same time | Spend here. It is the cheapest thing you will ever upgrade and the hardest to change later |
| Panel count | High | Medium, and often in the wrong direction | Decide once, early, and ask what it does to the clear opening before you pay for the extra sash |
| Colour and batch | Low | High, but only on the day you need one more unit | Do not negotiate it. Write it down and make the factory write it back |
| Screen | Low to medium | Medium, because it sits on the opening and it wears first | Decide once, and add the mesh and the rollers to the spare parts line |
| Which panel moves | Zero when right, total when wrong | Total | Spend no money. Spend two minutes with a photograph of the wall |
| Which number is 60 x 48 | Zero when right, total when wrong | Total | Spend no money. Write millimetres into the enquiry and make the reply repeat them |
Read the last two rows together. The two decisions that cost the most when they are wrong cost nothing when they are right, and neither of them is a purchasing decision. They are a writing decision.
Copy this block into an email. Send the same block to every supplier you are considering. The replies become comparable because the questions are, and the suppliers who cannot fill it in have told you something useful.
| Line | What to write | Why it changes the number |
|---|---|---|
| 1 | Frame size required: ____ x ____ mm | This is what gets cut. Nothing else on the order carries this much consequence |
| 2 | Rough opening available: ____ x ____ mm, and who owns it: ____ | The two published conventions differ by about 3 mm. Name the owner before the hole is built |
| 3 | Wall build-up from outside face inwards: ____ | Decides the sill detail, the flashing and who signs the perimeter seal |
| 4 | Wall depth available: ____ mm | 130 mm against a 116 mm jamb. Fourteen millimetres, decided by the building |
| 5 | Panel count and which panel moves, viewed from outside: ____ | Handing is cut into the profile. It is free now and a new unit later |
| 6 | Net clear opening required: ____ x ____ mm; egress required: yes or no | The only area the window is for. Roughly 38 per cent of the hole at this size |
| 7 | Glass build-up, coating surface, fill and spacer: ____ | Sets sash weight, which is the quiet ceiling at this size |
| 8 | Screen: type, which side, removable without tools: ____ | The part that wears first and the part most often left off the spares list |
| 9 | Colour, second colour if any, and batch rule: ____ | Decides whether a replacement sash in five years matches |
| 10 | Quantity, delivery term, port, currency, and the date the number must hold until: ____ | A quotation without a date is an opinion. A delivery term is a scope statement |
Ten lines, filled in once, sent to everyone. It is the highest return hour in the whole procurement, and it costs nothing.
This is the part where it is cheaper for us to be honest than to be impressive.
| Item | What we publish | What it actually is | What you must request |
|---|---|---|---|
| Alloy and wall thickness | 6060-T66, 1.8 to 2.0 mm on the TS130 | True for the whole line, so it is not a differentiator between our own series | Nothing. It is the same answer everywhere, and anyone who sells it as a difference is selling you nothing |
| TS130 geometry | Frame wall width 130 mm, glass sash thickness 55 mm, sash width 75 mm, frame width 26 mm, track height 53 and 31 mm | 130 mm is how far it goes into the wall. 55 mm is a stack of sash, not a glass rebate | A section drawing with the glass rebate dimensioned |
| Load bearing | 200 kg pulleys on the TS130; 220 kg driving capacity on SL112/167; 400 kg twenty wheel on SL155 | Three different measurements, two of them on doors, none of them a maximum sash size | Maximum sash width, maximum sash height and maximum sash weight for the TS130 at your glass build-up |
| Thermal performance | K 1.3, published for the AW90 passive window | A system value for one series. Not a whole window rating, not another country's rating scheme, not a value for the TS130 | A calculated value for the TS130 with your glass, in the units your authority uses |
| Corrosion and strength tests | 240 hour salt spray and 5000 N shear, published for the AW90 | Coating substrate and composite bond. Not air, water or wind performance, and not transferable to another series | Air, water and structural ratings for the series and configuration you are buying |
| Production | Two production centres, Foshan and Zhaoqing | Two plants, one catalogue, and no published rule for which one gets your order | Which plant will make this order, in writing, before you pay a deposit |
| Catalogue coverage | One sliding window, the TS130 side press window | A side press window is a push pull and swing hinge hybrid, not an ordinary two track slider | Nothing. If a plain two track slider is what you want at 60 x 48, we will tell you we do not make it rather than quote you a door |
| Prices, quantities, ratings, spare parts | We publish none of them | Not because they are bad, but because a number without the six decisions is not a number | All of them, against the ten line block above |
Two more honest notes. Several of our category pages are empty, including swing doors, folding doors and entry doors, and one of our tilt and turn listings is a placeholder rather than a specification. If the window you want is in one of those categories, we will say so. And on 60 x 48 sliding window enquiries we would rather lose the order than sell you a product that behaves differently from the one you drew.
Send these with the ten line block. The third column is the one that saves you money, because a fluent non answer costs you a week and tells you nothing.
| Question | An answer you can use | An answer that sounds right and means nothing |
|---|---|---|
| Is 1499 x 1194 the frame or the hole | A drawing with the frame dimensioned and the hole shown separately | Standard size, no problem |
| What is the net clear opening | Millimetres, width and height, at the configuration being quoted | Meets egress |
| Maximum sash weight for this series | A number in kilograms, with the glass build-up it applies to | Our pulleys carry 200 kg |
| What glass build-up is in this price | Every layer written out, with coating surface, fill and spacer named | Double glazed, low E |
| Which panel moves, viewed from outside | XO or OX, stated, and repeated back on the order acknowledgement | Reversible on site |
| Is glass included, and who warrants it | A yes or no, plus the name of the party that warrants the sealed unit | Glass can be sourced locally |
| What is the delivery term | The three letter term, the named port, and a list of what crosses at that point | Shipping can be arranged |
| How long does this number hold | A date, and a statement of what moves the number if something changes | Valid for this month |
| Spare parts that ship with the order | A named list with quantities, in the original container | Wear parts are available |
| Which plant makes this order | A named site, before the deposit | Made in China |
The honest version of this article has to include the cases where no amount of good specification fixes the choice.
| Situation | Why a 60 x 48 slider fails | What to specify instead |
|---|---|---|
| You want the whole opening to open | A two panel slider gives you about 38 per cent of the hole by design, and a third panel usually makes the widest single opening narrower | A casement or a tilt and turn unit, where the sash becomes the opening instead of about 38 per cent of it, which is the trade a 2 panel sliding window makes by design |
| The wall is shallow or unknown | 130 mm of frame wall width against a jamb depth that was never measured is a site modification, not a window order | Measure the wall first, then choose the series |
| The room needs the best possible air seal | A sliding sash seals by compression against pile or fin, which is inherently looser than a sash pulled against a gasket | A compression sealing casement, or our side press window, which presses the sash against the frame |
| Coastal or poolside exposure | The lower track holds water by design, and the rollers live in it | Same unit, but specify fastener material, coating class and a maintenance interval in the order |
| You are replacing one unit in a painted facade | A single unit is the worst possible quantity, and the colour will not match the batch it replaced | Order one spare sash, or plan the elevation as a whole |
| The opening has to be cleaned from inside on an upper floor | One lite is permanently behind the other, and the outer face of the fixed lite is unreachable | An inward opening unit, which is the reason tilt and turn exists |
Both, depending on who wrote it. One retail listing for a nominal 60 x 48 gives a rough opening of 60 x 48 inches and an actual frame of 59 x 47 inches. One manufacturer chart gives a rough opening of 59 7/8 x 47 7/8 inches for the same call size. Write the frame size in millimetres on the order and make the supplier repeat it back.
Because a price is a function, and six of its inputs are not in the phrase. Panel count, glass build-up, handing, screen, colour and batch, quantity and delivery term each move the number further than the size does. Give a supplier the ten line block and you will get a straight answer within a day, because you will have removed the reason for the vague one.
On the one published chart that separates the opening from the hole, a 60 x 48 gives a net clear opening of about 7.58 square feet, at roughly 656 by 1075 millimetres. The two minimum figures most often printed for a bedroom are 5.7 and 5.0 square feet, and which applies depends on floor level and on your authority. Ask the authority, and ask the supplier for the clear opening in millimetres before you rely on any of it.
Probably not, and the reason is the opposite of the one you would guess. A 60 x 48 sash lands in the twenties or low thirties of kilograms, which is well inside almost any published roller rating. What you are near is the sash weight limit of the series, and that is a different number that almost nobody publishes. Ask for the maximum sash weight at your glass build-up before you spend anything on hardware.
No. One published listing for this size says it plainly: the window cannot be installed sideways or in any other orientation, because the drainage is designed to go one way. Turning a slider on its side does not make it a different window. It makes it a water feature.
Measure the wall depth and take a photograph of the opening from outside. Those two things close the two decisions that cost the most when they are wrong and the least when they are right. Everything else in this article can be resolved on paper. See completed work at the scale this article is about on our Projects page.
Before you send the enquiry. Copy the ten line block, fill it in, and send the same block to every supplier. Ask for the net clear opening in millimetres, the maximum sash weight at your glass build-up, and the delivery term. A quotation that cannot answer those three is not cheaper, it is just quieter about what it left out.
And if what you actually want at 60 x 48 is an ordinary two track slider, we will tell you we do not make one. Our sliding window catalogue has a single product, and it is a side press window. That is not a sales position. It is the difference between a window that behaves like the one you drew and one that does not.
