Double roller for glass sliding door

A quick learner from Ft Myers says:
Norandex glass sliding door double roller.
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Bob from SWISCO responded:

This looks like a dead ringer for our 81-171, which is often seen in Norandex doors. Take a look and see if the dimensions match. 

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