Double brass 1/2" wheel sliding window roller

A handy person from Alamo CA says:
August 23, 2015
Can you help me determine replacement part for 1/2" double brass window roller.
I am not sure of window make so i have included a picture of window at the bottom. the house was built 17 years ago

thanks
User submitted photos of a window roller.
Profile picture of Tom
Tom from SWISCO responded:
August 25, 2015
Hello! Our 87-036 roller appears to be our closest match. The dimensions are very similar, as well. Do you think you could use this as a replacement? It only has one wheel, but that is the case for almost all window rollers like this. They are only meant to use one wheel, you see; it has two slots to allow for adjustment, as one is higher than the other. I can even see in your own pictures that one wheel appears to be slightly higher than the other.
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