Plastic part installed top side of the window which holds the spring
A home owner from Alston, MA says:
September 9, 2022
this part is 2 1/4 x 3/4 x 7/8
Emily from SWISCO responded:
September 13, 2022
Hi there!
We don't have this exact top sash guide but start by taking a look at our 18-188 and compare our dimensions with yours to see if this matches what you need.