Sliding Glass Door Rollers

A quick learner from Skagit County, WA says:
Good evening, I'm having trouble finding this part. There are no product numbers found nor any markings. I've found some on your site that are similar, but the top side of the part looks different. I have no idea if this will cause a problem in replacing. They go to a Guardian brand sliding glass door installed in the early 1990's. Thank you and I hope this is enough info for you to be able to help out.
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Tom from SWISCO responded:

Thanks for posting! Your roller is very similar to our 81-165. I think this may be what you want, but please review our photos and dimensions and let me know what you think.

Alternate image for 81-165
Alternate image for 81-165
A professional from CA says:
Personally I'd go with 81-157. The top hole doesn't matter and the wheels are bigger and better.
A quick learner from Skagit County says:
Thank you for getting back to me, and your input. I was concerned with the top being different if that would affect it's seating. I measured the wheel diameter of current rollers and they are the same size as the 81-157
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