Can you tell what part number these are?

A handy person from USA says:
Can you tell what part number these are?
User submitted photos of a patio door roller.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Based on the style, I have some ideas. You need to narrow it down based on the size. Check out the 81-242, with a 1-1/4" wheel, and the 81-255, with a 1-1/2" wheel. See which one of these, if either, matches the dimensions of your old part.
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