Help me identify a window balance

Thanks for posting. Can you send pictures of the nylon fittings on either end of the metal channel? That will help us confirm what you are working with. That stamp only tells us the strength of the balance, not its identity, so photos of the attachments is the best thing to go off of. Many thanks.  

Perfect, thank you. This looks like our S395-27. For a new stamp option, choose 2640. Let me know if you have any further questions. 

Great! We really appreciate the business, it means a lot. Feel free to reach out if we can be of any further assistance.