Old un marked door

A quick learner from Warminster, PA says:
The door is un marked but it,s double pane glass so I'm thinking at least 25 years old The width is 13/16" Length is 3 3/4" and the height his 1 1/2" can you help us out?

User submitted photos of a patio door roller.
Profile picture of Paul
Paul from SWISCO responded:
I've seen this kind of roller before. If you have what I think you have, then I have used our 81-020 roller assembly as a substitute. You just have to reverse the screws, since you have the adjusting screw on the top where the 81-020 has it on the bottom.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I agree with Paul. The 81-020 is the best option for you. I can't guarantee that it will work, but yours is no longer made.
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