single sash window balancer, block and tackle type

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Quick Learner from Micanopy, Florida, 32667

Nov 9, 2021 4:14 pm

Brand, unknown
Aluminum channel length is 25"
width is 1/2"
Number stamped on channel is 2440

5 user uploaded images

3 Replies

Casey from SWISCO

Nov 11, 2021 2:01 pm

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 2440 spring strength option for your replacement balances. Thank you!

Comparison of the S351 and S390 balance shoes.

Quick Learner from Micanopy, Florida, 32667

Nov 11, 2021 2:15 pm

Thank you Casey for the response.
The balancers I'm replacing are 1 inch deep.
I will be ordering the S351-25 with the 15-002 bottom attachment with 2440 spring strength.
I appreciate your effort. It helps me get the right parts the first time.

I'll be back for more parts.