# on balance is 24B

Question

Looking for a complete kit to replace the balance in the window.

Casey · Accepted Answer

Hello,

It looks like you have either our S351-25, with a 15-002 bottom attachment, or S390-25, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need a 2420 spring strength option for your replacement balances. Thank you!

Comparison of the S351 and S390 balance shoes.