Rollers for Heavy Aluminum Dual Pane Windows

A quick learner from San Diego says:
Submitting pic on seperate email of old sliding window roller assembly. Have 12 large heavy aluminum dual pane windows in Mexico and need to replace with quality roller assemblies. 2 and 1/8"tall, 1/4" x 3/8" wide with sheet metal screw to anchor in place. Windows were assembled on site three years ago in central Baja Mexico by a small window installer from Ensenada 7 1/2 hrs north there and 2 hrs south of the border. Suspect aluminum frames were imported from Southern calif.
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Paul from SWISCO responded:
Start with this: take a look, and compare your old roller to our 87-173 1/2" flat wheel roller. It may be a match, but check the dimensions carefully.
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