Coil spring broke ..both sides

Hello!

This looks like an older version of our 15-180, which uses Series 190 coils springs. Compare our dimensions to yours to see if this matches up to your original pivot shoe. 

If your window weighs exactly 17 pounds, you can use one S190-440 and one S190-540 on each side of the window. This would total 18 pounds of overall support; so long as the spring weights are within a pound of your sash's actual weight, this setup should work for you. 

Let me know if you have any questions!