Hybrid Balance Quote Request

Hi Dennis. I'm confident we can help, but I'd like to confirm exactly what you're working with here. Can you show me pictures of both ends of the balance? That would be a huge help in narrowing down what you're working with. We'll do our best to help from there. Many thanks. 

Thanks for these pictures, Dennis. This actually looks like a Series 770 Channel Balance. If the metal channel is 35" long, then you will need the S770-35. Check how the balance attaches to the top of the window jamb. Does it screw in, or does it use a hook? If it uses a screw, you can use the stock version of this balance and order it right from our website (let me know if it instead uses the hook, and we can work something else out). You'll have to choose a stamp option, which reflects the weight range the balance is calibrated to support. To know what weight range to select, weigh the window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option under the product description on the balance's shop page. Let me know if you have further questions.