Patio Door Roller Assembly

A home owner from Dallas TX says:
Please help me find replacement rollers like that attached.
Wheel appears to be nylon and is 1-3/4" diameter
Overall length is 3-1/4"
Wheel is marked Kilian.

User submitted a photo of a patio door roller.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting, David. Check out our 81-140 and let me know if you could use this as a replacement.
A home owner from dallas tx says:
Thanks. Exact match. I ordered two.
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