20 3 Caldwell KM Channel Balance

Question

Hi, I need to order replacement window channel balance. There is a part number on the part that says "20 3 Caldwell KM". I have attached the photos of the part.
Please help identify what to order. Thank you!

Casey · Accepted Answer

Hello,

With this combination of attachments, you could have either an 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 2030 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.