Top Sash Guide

A quick learner from Litchfield Park, AZ says:
I am having trouble identifying which sash guide this is. This is a picture of the one still in the window. Can you please help.


User submitted photos of a top sash guide.
Profile picture of Tom
Tom from SWISCO responded:
Hey, Mike. Start with our 18-177. This looks like what you have, but just confirm the measurements match.
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