Sliding window rollers

A quick learner from USA says:
Please take a look at these 3 photos. These are the rollers on the sliding windows. what is the best replacement you can find for it.
User submitted photos of a window roller.
Profile picture of Mike
Mike from SWISCO responded:
I believe you may have our 81-257 sliding glass door roller that was used on Miller patio doors. Please take a look and carefully compare your measurements and dimensions to ours. Get back to us with some thoughts.
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