Need replacement rollers

A home owner from Stover, MO 65078 says:
We have an "ANSI AAMA 101-85 SGD-R20, Series M-800/M825/M850 door". We are needing replacement rollers for the glass sliding door, bottom.
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Tom from SWISCO responded:

Unfortunately, that code doesn't tell me what you have. There is no code, sticker, stamp, or marking that will tell you what your rollers are. The only way you can learn that is to remove the originals and show us photos of them to ID.

When you take your photos, make sure we can see the rollers from the side, top, and rear. We will also need detailed dimensions.

A home owner from Stover,MO 65078 says:
Attached are photos for replacement rollers. Do they come in pairs or can you buy one to replace the broken one ?
What is the total price & do they come by USPS ?

Thank You
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Tom from SWISCO responded:

Thank you. This roller looks like a match for one of four styles: either the 81-023, 81-278, 81-279, or 81-282. You need to carefully review the dimensions we show on each products' store page to confirm the best match. You can also find a detailed price breakdown on these store pages.

These rollers are sold individually, not in pairs. Delivery cost is calculated for you automatically during checkout depending on what shipping option you choose.

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