Sliding glass door rolers

A quick learner from Rocklin Ca says:
How do you find the manufacture so you know what parts to order. I looked at the frame and did not see anything that would help me tell you what rollers that I need to order.

The door is about 20 years old.
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Tom from SWISCO responded:
Thanks for posting. There may be a manufacturer code somewhere on the inside frame of the door, but to be honest that might not be the best method. Many manufacturers use many different kinds of rollers over the years, some of which are generic and cannot be traced to any one door in particular. The best method of identifying a replacement sliding glass door roller is to remove it entirely. If you were to show us a picture of your roller out of the door, we can recommend a replacement.
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