Need replacement for window balance

Hello,

With this combination of attachments, you could have either the S380-24 or S385-24 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. 

You'll also need to weigh your sash to determine which strength option you'll need. There is a chart on the product page that explains how to choose your option based on the sash weight. Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.

The sash is the bottom part of the window that you open and close, which is supported by the channel balances. You'll need to remove the sash and weigh it on a bathroom scale to determine the calibration for your replacement balances.