Sash Top Guide - Which One?
A handy person from Puerto Rico says:
June 13, 2016
After searching for a while I was unable to find the attached Sash Top Guide. I can't see any stamped number but I've included the measurements in the picture.
Paul from SWISCO responded:
June 15, 2016
Check out our 18-166 top sash guide. I think this may work for you.