April 13, 2020
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.
April 15, 2020
Personally I'd go with
81-157. The top hole doesn't matter and the wheels are bigger and better.
April 17, 2020
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