Window balance

Handy Person from Denair, Ca

Jan 15, 2026 6:09 pm

This is from an aluminum window frame
Balance is 22" long without end fittings
21 C. B.S.I stamp. I believe it is the 390 balance as foot is 1 1/8"
Do not know which weight balance to get

5 user uploaded images

2 Replies

Emily from SWISCO

Jan 16, 2026 2:32 pm

Hi there!

Thanks for reaching out to us. Based on the given information, you'd want the S390-22 as you mentioned. You may need the 2130 stamp option based on the old stamp, but we recommend weighing the window sash to confirm whether it falls within the 12 to 15-pound weight range.