Window channel balance

Hello there!

Thanks for reaching out to us. We're happy to help with this. Can you show us a close up photo of the top fitting? I'm afraid the tape measure obscures too much of it in the photos you've uploaded. 

Thank you kindly! This looks like our S380-18 or S385-18 channel balance depending on the depth of the bottom shoe. If it's 1" deep, you'd want the S380-18. 

Your 1790 stamp is from an old rating system we no longer use, however. You would need to weigh the window sash on a scale and refer to the chart under the product description on the S380-18 store page to determine the proper stamp option for your replacements. 

Comparison of the S378, S380 and S385 balance shoes.

You'll want to weigh the window sash, not the balance. The window sash is the glass panel that moves up and down.