Series 140 Quick-Tilt Balance Quote
Hello there!
Your pivot shoe looks like a match for the 15-177, which uses the Series 152 coil springs. You'll have to check the spring band for a stamped weight code.
If you need a new coil support, see the 15-143, 15-144, and 15-145. They "sandwich" over the coil spring.
Are you referring to the pivot bar? If so, we'll need to see the old one removed from the window, including written-out dimensions.
Our pivot bars aren't handed, so you'd have to turn the pivot bar to the correct orientation for the window sash.
See the 15-177 pivot shoe and Series 152 coil springs (sold separately). If you need a new coil support, see the 15-143, 15-144, and 15-145. They "sandwich" over the coil spring. The video below will go over how to pick the correct coil weights.
As for the pivot bar, take a look at the 26-466. Review the specifications and see if they match what you need.