Coil balance constant force parts replacement

Thanks for posting. This looks like our 15-199 Pivot Shoe. This is compatible with our Series 165 Coil Springs. Check all the dimensions listed to make sure these parts match your old components. To know what weights to select for your coil springs, look for stamped numbers along the tape of the coil springs. If you can't find any stamps, weigh your window sash. Give us that exact weight along with the number of coil springs on each side of the window sash, and we'll calculate what you need.