channel balance

Hello,

With this combination of attachments, you could have either the S380-28 or S385-28 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 2740 spring strength options for your replacement balances. Please note that we recommend replacing both balances in the window at the same time since replacing one side can result in damage to the balances or the window itself. Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.

You would need to measure from the front of the winged tab straight back to the rounded portion of the shoe to determine the depth.