Replacement single hung balance spring 2830

Question

Hi there, and happy new year!
I'm in need of replacing 4 of these 2830 , 29" long balance springs from a single hung window(s). They're from 1987.
My closest estimation is your Product Code: S385-29.

Thank you,
Kevin

Lauren · Accepted Answer

Hi Kevin, thank you for posting,

With this combination of attachments, you could have either an S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

You will need a 29" balance with a 2830 stamp option. Please review and let me know if you have any additional questions!

Comparison of the S378, S380 and S385 balance shoes.