Alcan door rollers

A quick learner from Florida says:
Hello, these rollers are installed by removing the aluminum frame off the glass, and are just slid into position. The windows are alcan, and I assume the rollers are a 81-133 , but not sure
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Emily from SWISCO responded:

Hi there!

I agree. This looks just like our 81-133 but compare our dimensions to your old roller to see if they match up. 

Alternate image for 81-133
Alternate image for 81-133

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