sliding glass door replacement rollers

A quick learner from Kauai says:
Looking for metal replacement rollers for our vinyl sliding glass doors (door model number SGD-LC25 - no idea of the brand). The metal of the rollers needs to be something that can handle the tropical environment of Hawaii.
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Bob from SWISCO responded:

See our 81-158 Tandem Roller. Look over the dimensions and see if you think this could work for you. 

81-158 : Dual Roller Assembly, 1-1/4
Dual Roller Assembly, 1-1/4" Steel BB
81-158
$13.09
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