Best suggestion for replacement

A home owner from Alberta, Canada says:
Sorry, no markings were found on the roller. Would it be possible to replace with a double roller or best to replace with one roller?
Thumbnail of the uploaded file named Alcan Patio Roller
Thumbnail of the uploaded file named Patio Door Roller
Thumbnail of the uploaded file named Single Wheel Roller
Thumbnail of the uploaded file named Patio Single Roller
Profile picture of Jasmine
Jasmine from SWISCO responded:

Thanks for writing in! Your roller reminds me of the 81-251 Alcan Roller Assembly. To confirm that this is the right replacement carefully compare the dimensions below to your existing roller.

Detail of 81-251
Detail of 81-251

Profile view of 81-251
Profile view of 81-251

I'm sorry to say that there aren't any rollers we would be able to recommend from our inventory that could be used to convert the door to one that uses a tandem roller.

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