The sash top guide is broken, it should be 5/8" size
A home owner from 98208 says:
October 9, 2017
Not sure which part number is the one and what the screw type of the top one.
I ordered 18-009 and 18-064, would like to confirm whether they are working, thanks.
Paul from SWISCO responded:
October 13, 2017
Both our 18-009 and 18-064 top sash guide are both 5/8" to fit in the sash. Top ensure compatibility, we highly recommend to carefully compare your measurements and dimensions to ours to see if these will work for you.