Tandem patio door roller nylon

A quick learner from Quebec says:
Do you know what model is this?
Thank you,
User submitted a photo of a patio door roller.
Profile picture of Tom
Tom from SWISCO responded:
Hello! I can't find an exact match for this, but it looks similar to our 81-138. Carefully compare our dimensions with your own and let me know how well they line up.
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