Need help identifying single roller

A home owner from Texas says:
Hello, I need four of these, or ones that are compatible.

Thanks in advance for your reply.
User submitted a photo of a patio door roller.
Profile picture of Paul
Paul from SWISCO responded:
Hello, Curtis. I recognize this roller. I recommend our 81-088. Your exact version has actually been discontinued, but the manufacturer made the 81-088 as a substitute. See what you think!
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