sliding window wheel and wheel housing

A quick learner from Palmdale CA says:
December 6, 2020
Looking for a replacement.

Wheel measures 5/16th across. The plastic housing is 13/16 back to front, 7/16th wide. The front lip (facing into house) is 7/16, the back lip (facing out) is 3/8 The retainer screw passes on the edge of the plastic housing, and it has worn a groove into it, near my thumb where I am holding it. It appears to be the full wheel component, no broken off parts.

Sits in a 1x1 inch slot

Window is pretty old, house built in 1989.
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Bob from SWISCO responded:
December 9, 2020

This might be our 87-138, which has a wheel diameter of 5/16". Look at the picture below as well as the other dimensions listed on the shop page, and see what you think.

View of wheel for 87-138
View of wheel for 87-138
Keller Sliding Window Roller, 5/16" Flat Wheel
Keller Sliding Window Roller, 5/16" Flat Wheel
87-138
$4.39
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