window balance identification

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Quick Learner from Dublin CA

Aug 15, 2026 9:47 pm

Metal length is 30 inches. The marking is 29 3 BV CMC 7.

5 user uploaded images

4 Replies

Bob from SWISCO

Aug 16, 2026 4:18 am

Hello there. Start by comparing to the S380-30 or S385-30. The only difference between these two channel balances is the shoe depth--see below. For a stamp option choose 2930.

Comparison of the S378, S380 and S385 balance shoes.

Quick Learner from Dublin CA

Aug 31, 2026 8:56 pm

The S385-30 works great on my window. Thank you!

Bob from SWISCO

Sep 4, 2026 10:09 am

Great! Glad to hear it. Do let us know if you need anything else.