Help my mom's windows stay open

Question

Hey there! Hope you can help me out and have these things. Thanks! Andy
Metal Length 34.5"
Channel .5"
Markings: 3430 EH SI Window Hardware
I don't have any pictures showing this installed, but if you need them, I'll figure out how to get them!

Casey · Accepted Answer

Hello,

It looks like you have either our S351-35, with a 15-002 bottom attachment, or S390-35, 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 3430 spring strength option for your replacement balances, which will support a sash between 18-23 pounds. Thank you!

Comparison of the S351 and S390 balance shoes.