Ga278 is the part number I think.

A quick learner from Tennessee says:
April 15, 2023
These have 7/18 wheels
On mi aluminum sliding window
I think 818 series
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Jasmine from SWISCO responded:
April 18, 2023

Thanks for posting! We do not carry an exact match for the sliding window roller you are searching for but our 87-222 might be worth considering. Look over the dimensions and compare them to your roller to see if this might be a fit. Please not that the encasement surrounding the wheels of the roller is different than yours.

Dimensions for 87-222
Dimensions for 87-222
Tandem Roller Assembly
Tandem Roller Assembly
87-222
$4.87
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