Macor sliding door roller

A handy person from Elgin IL says:
These rollers are from a Macor sliding door. Only product info is
Product of
Del Mar eng co.
Long Beach Cal
Pat 3,670,357
Notice you suggested your part # 81-357 which looks like it could work for me. Unless you have two roller models now?
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Paul from SWISCO responded:

Hello,

We believe the 81-084 is the closest option we have for a replacement. Compare our dimensions to yours and see what you think. Keep in mind, being just a single roller, the life expediency will be less than a tandem roller assembly.

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