Roller assembly

A quick learner from Brownsville, Tx says:
It's a ply gem sliding door . About 3 years old. Home Depot purchas. Hope you can help me. Thank you.
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Bob from SWISCO responded:

Hello there. I believe this is our 81-156. Please compare with the diagram below to confirm. Let me know if you have further questions.

Alternate image for 81-156
Alternate image for 81-156

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