Hey there!
Compare your dimensions to our 15-111 pivot shoe, which uses the Series 160 coil springs, to see if this matches up to your original part. If you need the tilt latches as well, see if our 26-243 and 26-244 match what you need.
Hi, Sally.
The 15-111 uses the Series 160 coil springs. As for what coil weight to select, there should be a stamp on your coil springs that will tell you what weigh you'll need. If you're not sure what weight option you need for the replacement coils, you'll need to weigh your window sash and divide the weight by the number of coils in the window.
As for the coil support, see either our 15-150D 1/2" coil double support or 15-150T 1/2" coil triple support depending on how many coil springs you have.
Let me know if this makes sense or if you had any questions.
No problem! Let me know if you need anything else and best of luck with the repair!