Remplacement window channel balance

Question

We are looking to replace our window channel balance. It is 24'' long, 5/8'' depth and 9/16'' wide. The stamp indicates 23B.
Thank you.

Bob · Accepted Answer

Thanks for posting. This looks like the S351-24 or S390-24 Channel Balance. The only difference between these two balances is the 'depth' of the bottom nylon shoe, or the heel-to-toe measurement. See the diagram below for reference. In either case, for a stamp option choose 2320.

Comparison of the S351 and S390 balance shoes.