Tandem wheels for 8' Sliding Doors

A contractor from Melbourne, Florida says:

Looking for the correct replacement wheels for 8' Sliding Glass Doors. There are no markings or numbers on the Doors or Wheels. So we are unable to determine the brand. Housing is 5" long by 1 1/2" high.

Please assist with identifying the best replacements.

Thanks,

Terry W.

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Casey from SWISCO responded:

Hello, thank you for writing in. Take a look at our 81-171. Compare its dimensions to your own hardware to ensure that this could be a match. Good luck with your repair! 

81-171 : Tandem Roller Assembly, 1-11/16
Tandem Roller Assembly, 1-11/16" Nylon Concave
81-171
$32.73
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