Metal rollers that mount vertically; metal wheels; Phillips screw holds the device in place

A handy person from San Diego, CA says:
Hi,
I need 20 of these metal vertical rollers.
Metal rollers that mount vertically into extruded aluminum metal windows; metal wheels; Phillips screw holds the device in place.
Thanks!
User submitted photos of a roller.
Profile picture of Paul
Paul from SWISCO responded:
I believe you want to look at our 87-196 roller. Check it out and let me know what you think.
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