Non Tilt Window Balance

Home Owner from Miamisburg, Ohio
Jul 30, 2021 3:52 pm
Part I need says 2640 on it. I have several windows that need new window balance but I wanted to try one first to make sure I can fix. Can you help me identify what I need by looking at the picture?
1 user uploaded image
2 Replies

Bob from SWISCO
Aug 4, 2021 11:04 am


I believe this is either an S380-27 or S385-27. The only difference between these two balances is the depth of the bottom nylon shoe as pictured below. Compare both with your old hardware to see what matches best. For a new stamp option choose 2640.

Comparison of the S378, S380 and S385 balance shoes.
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