Single Hung Window Balance Spring Replacement

Home Owner from Florida
The channel measures 30" in length and is 5/8" in depth. Stamped on the channel is 29-4 BSI. What replacement part do I need? Thank you.
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2 Replies
Casey
Casey from SWISCO
SWISCO
Expert

Hello,

With this combination of attachments, it looks like you'll need our S395-30 with a 2940 spring strength options based on your stamp number. Thanks for posting!

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