Coil Balance parts and Shoes
Thanks for writing in! The shoe in your assembly is quite likely a match for the 15-180 Coil Balance Shoe. To confirm that this is the correct replacement, carefully look over the specifications and compare them.
The compatible coil spring is the Series 190 Coil Balance; attached using the 33-073 screw. They are anchored to the window jamb using the 15-186 Coil Balance Clip and 15-182 Balance Bushing.
To determine the correct coil weight option, you'll need to either look for a stamp/marking on the coils or confirm the exact sash weight. Take a look at the tutorial below for instructions on how to select the correct coil weight option.