Looking for horizontal tandem window rollers

A home owner from Reno, Nevada says:
Horizontal slider, tandem rollers, measurements are: 1 6/16 X 7/16 X 7/16.
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Tom from SWISCO responded:

This roller is similar to our 87-221, but I'm not sure if t his is a match. Your dimensions are a little off so I would recommend double checking them to be sure. You can use the dimensions for our 87-221 as a reference. If they differ in any significant way, let me know.

Dimensions for 87-221
Dimensions for 87-221
Dimensions for 87-221
Dimensions for 87-221
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