When I remove both sides it looks like there is a right and a left for the sash guides. both are cracked and missing pieces.I measure 1" for the width and 7/8" long
Bob from SWISCO responded:
August 18, 2020
This looks like our 18-168 Yale Top Sash Guide. Look it over and see if you agree. You can simply flip this around to fit either side of the sash.