Window balance order

Thanks for posting. I'm confident we can help, but I am afraid those stamps do not tell us your balances' identities; they just denote their strength calibration. To know the identity of the balances you need, we need to see photos of the nylon fittings or attachments on either end of the metal channel. The combination of fittings that your balance uses will determine what kind you have. If you can send us those photos we should be able to narrow this down for you. See the video below for more details. 

Thanks for your photos. Based on what I see here, you have either our Series 380 or Series 385, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.

Comparison of the S378, S380 and S385 balance shoes.