Window ballast 28D

Thanks for reaching out! This window balance appears to be a match for the S770-28 with a 28D stamp. Although, I'm not able to tell if yours are screwed in at the top of the window track. If they use a clip, please let me know as the replacement will need to be custom assemblies.

The reminds me of the 15-129 Pivot Shoe but we are not able to supply a replacement for the metal clip inside yours. However, I do believe the window should work fine without it.

Take a look over the dimensions below and see what you think.

Detail of 15-129