Top Sash Guide
A quick learner from Litchfield Park, AZ says:
November 24, 2015
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.
Tom from SWISCO responded:
November 25, 2015
Hey, Mike. Start with our 18-177. This looks like what you have, but just confirm the measurements match.