Replacement closet door roller

A handy person from Portland Oregon says:
Are these your brand or do you have a model that can replace them ?
A customer submitted photo of a closet door roller.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting! This looks very similar to our 81-256 Sliding Glass Door roller, however I am not certain. What are the dimensions of your hardware? The wheel diameter and casing width are very important. Do they match up with the 81-256?
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