SWISCO - The Replacement Hardware Authority

Rollers for my 311/312 VSGD Sliding Glass Door

A quick learner from Richmond, VA says:
Can you please tell which rollers I need to order so my contractor can replace the rollers on my ELL-1 A-L-1 VALIDATOR; SERIES: 311/312 VSGD; TYPE: SLIDING GLASS DOOR?
Thank you!
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Paul from SWISCO responded:
Unfortunately, I can't determine what you have based on this information. You could start with our 81-030, 81-095, or 81-154, but you will need to remove your roller from the door and carefully compare it to our information to confirm if any of these can work.
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