SWISCO - The Replacement Hardware Authority

lots of friction opening/closing sliding glass door

A home owner from Burien, WA says:
SGD-R20 series 720 is identified by label on door. I presume the rollers are worn out after at least 25 years of use. What part number roller do I need to purchase for replacement?
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Tom from SWISCO responded:
I'm afraid I cannot determine what you have based on this information. We will need to see a picture of the roller fully removed from the door. We would also need your measurements. Let me know!
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