Prime-Line Single or Double Hung Window Sash Cam, Top Mount (2-pack)

This plastic sash cam fits onto the upper top sides of the window that is sliding up or down. The sash cam and window then rest on the top guide of the sash balance. This sash cam has a top of 7/8 in. wide by 31/32 in. deep and 1-1/2 in. tall. The width needs to fit correctly in the window's track frame in order for it to slide up or down properly. The depth allows the window to correctly rest on the top guide of the sash balance.