Hello there!
We appreciate you reaching out to us. Our Series 751 ribbed channel balance looks like a good match for what you show here. There should also be a stamp on the metal channel that will indicate what spring strength option you'd need for your replacements. Take a look and let us know if you have any questions.
My apologies for missing that. We don't sell just the springs, unfortunately. I am very sorry for the inconvenience.
I'm afraid we can only supply the whole balance, not just the springs.
Our 26-150 pivot pair looks similar. Review the dimensions and see how they compare with your old hardware.
Unfortunately we do not carry replacement jamb liners that the balances fit into. I apologize for the inconvenience. Please let us know if you have any additional questions!
