Roller replacements

A handy person from Danville california says:
August 26, 2020

All the rollers have gone flat so windows drag. I plaxed a order and they are to large 

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Tom from SWISCO responded:
August 31, 2020

I see you bought our 87-094 wheel. You mentioned that it was too large, but you didn't say what size you actually need.

I can tell you at least that we don't have an exact match for the roller assembly you show in your photos. The three best options we have on our site are the 87-036, 87-143, and 87-190. We have detailed dimensions on each product's store page that you can use as a reference before you place your order. 
Sliding Window Roller
Sliding Window Roller
87-143
$3.97
Double Roller Assembly, 1/2" Nylon Flat
Double Roller Assembly, 1/2" Nylon Flat
87-190
$1.97
9/16" Flat Nylon Wheel
9/16" Flat Nylon Wheel
87-094
$1.05
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