Paul from SWISCO responded:
October 20, 2014
I would start by looking at our 81-244, but I highly recommend that you remove the old rollers and compare them to our specs before you make a decision.
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Tom from SWISCO responded:
October 28, 2014
Well, our 81-098 is a Pella sliding glass door roller without flanges. Could that be a match? If you aren't sure, take a few pictures of the roller and upload it here for us to see.
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