Identifying the Window Channel Balance

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Handy Person from Puerto Rico

Dec 28, 2025 12:19 pm

Hi:
The channel balance Dimendions are 26" and marking numbers on the back are 2520 BSITH. I have included the photos.

5 user uploaded images

2 Replies

Bob from SWISCO

Dec 28, 2025 11:46 pm

Thanks for posting. This looks like it might be the S390-26 or S351-26, depending on the depth of the bottom nylon shoe. See below. Measure your old balance's shoe depth to see what matches best. For a stamp option choose 2520.

Comparison of the S351 and S390 balance shoes.