Window Channel Balance

Quick Learner from New Jersey
May 6, 2025 11:02 am
It says 21b BSI. Looking to buy replacement for both sides of window.
2 user uploaded images
2 Replies

Casey from SWISCO
May 12, 2025 11:48 am


Hello,
We can't be sure with the balance still partially installed but take a look at the S351-22, with a 15-002 bottom attachment, or S390-22, with a 15-001 bottom attachment. Review the image below to determine if one of these balances will work for your repair. You'll also need a 2120 spring strength option for your replacement balances based on your original stamp code. Thank you!

Comparison of the S351 and S390 balance shoes.
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