Help finding the right window channel balance

Question

The only marking on it says "27 4 FX Caldwell. It is 28" long and 1/2" wide. Thanks for your help.
James

User submitted photos of a window balance.

Paul · Accepted Answer

Sure! We're always happy to help. Based on your pictures, I would recommend our S385-28 channel balance with a 2740 option. Please review this hardware and let me know what you think.