Window Balance Track

Question

Metal section is 21" long, 9/16" wide and 5/8" in depth.
The number on part is 2040 CA / B.S.I.
In need of 2 (1 pr)
Thank you

Casey · Accepted Answer

Hello,

With this combination of attachments, you could have either the S378-21, S380-21, or S385-21 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 2040 spring strength options for your replacement balances. Thank you, and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.