Window balance block???

Question

Any ideas what this part would be?   It has a single screw to secure it.  And it prevents the balance from shooting out the top.

Jasmine · Accepted Answer

Thanks for reaching out to us! The part you are searching for is the top sash guide. Yours can likely be replaced with the 18-036 1/2" Top Sash Guide but you'll need to be sure to carefully compare the dimensions to be sure.

This guide is only available in white.

Alternate view of 18-036

This guide is only available in white.

Alternate view of 18-036