No stamp

Question

I have matched up the length and mounts for required new balance. My old balance has no stamp or markings. It is a S385.27. It fits a sash that is 33" wide x 30" tall, vinyl double pane about 22 years old.
How do I determine an appropriate stamp number?
Thanks Much!
David

Casey · Accepted Answer

Hello,

If your balance has no stamp code, you'll need to weigh your window sash and follow the chart under the S385-27 product description to choose the corresponding strength option for your new balances. Thank you!