Searching for S870-20

Thanks for writing in! Your balance assembly is no longer made but we do have a solution that should work well to replace it. To confirm, there are a few details I'll need about the balance and the sash.

To start, please confirm the diameter of the spring. It should be 1/2", but if it is not please confirm the actual measurement. I'll also need to know the exact weight of the sash to determine the stamp option needed for the replacement balances.

Please let me know if you have any questions.