Window balance 34" and stamped 33DS38

Hello,

It looks like you have either our S351-34, with a 15-002 bottom attachment, or S390-34, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. 

Your stamp code indicates that your window sash weighs 38 pounds. If so, you'll also need 3365 spring strength options for your replacement balances. Thanks for posting!

Comparison of the S351 and S390 balance shoes.