identify the part for balance shoe

Question

I am attaching some pictures of a broken part and a working part on my window. Can you please tell me which replacement part works for me?

User submitted photos of a window balance.

Paul · Accepted Answer

Based on your 15-180 shoe and 15-181 coil support, I can tell that you need Series 190 coil springs. Check the end of the coil, where it touches the shoe, for a stamped number that tells you which coil in the Series you're going to need.