Compatibility with all doors

A quick learner from Miami says:
Are the 81-137 roller assemblies compatible with all sliding glass patio doors? The door was installed around 2002 and it is 6 foot wide. I cannot find the brand name of the manufacturer.
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Paul from SWISCO responded:
No, the 81-137 replacement roller is not compatible with all sliding glass doors. The 81-137 roller will work on many different doors manufactured by different companies but you must first check to see that it will fit. To check if the 81-137 will fit, you must remove one of your old rollers and match it up to the product picture of the 81-137.
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