doble roller nylon heavy duty slidding door

A handy person from West Palm Beach says:
5 inches long by 3/4 wide high 1 5/8
Thumbnail of the uploaded file named Sliding door roller.jpg
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Bob from SWISCO responded:

Thanks for posting. At first sight I am reminded of our 81-171. The dimensions are close to what you report, though not exact. Please double-check, review the diagram below, and let me know exactly what differs, if anything.

Alternate image for 81-171
Alternate image for 81-171

A handy person from West Palm Beach says:
Good morning Bob and thank you for the prompt reply.
Have questions,
In the schematic you sent me I looks very similar to mine, see only one screw in the front, my guess it is for adjustment.
Mine has 2 screws 1 for adjustment and the other to secured it to door frame.
Need the price.
if it does not fit can I return it?
Thank you.

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Bob from SWISCO responded:

That is very peculiar. I don't think I've ever heard of a roller that's designed like you describe.

If possible, I would like to see some more photos showing different views of your original part. The top, sides, front, and back with the hole and adjustment screw locations would be the most helpful. Would you also happen to know who made your door?

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