Window balance

Hello there. We'd be happy to help. To be safe, can you send me pictures of the attachments on both ends? I want to be certain we know what you have. Typically, the metal channel length is 1" longer than the first two digits of the stamp, so those details make sense. Seeing the attachments should narrow this down! Many thanks. 

That's perfect, thanks. This is either an S380-27 or S385-27 Channel Balance. The only difference between these two balances is the 'depth' of the bottom nylon shoe, or the measurement from heel to toe. See the diagram below for reference. Measure the depth of your old balance's shoe to determine which matches best. 

Comparison of the S378, S380 and S385 balance shoes.

Finally you have to choose a stamp option, which designates the balance's strength. Choose 2640, which accords with your old balance's stamp of 26-4. Let me know if you have further questions! 

I would definitely recommend making your own thread with photos, yes. That is the best way to ensure we can supply you with the best replacements for the hardware in question.

You may do that directly on our site at any time.