Pivot lock shoe for Paradigm window
Hello,
It actually looks like you have an older style version of the S140 coil balance assembly. I'd recommend weighing your sash and dividing the weight by two to choose the correct strength option for your window.
You can also find our return policy here if you'd like to send back the 15-177 pivot shoes that you purchased. Thanks for posting!
The 15-215 is the shoe that comes with the S140 assembly. You are welcome to purchase just the shoe but since your shoe has already broken, the coils and other parts of the assembly may not be far behind. You may have an easier time replacing both balance assemblies altogether but It's up to you and you may be able to get some additional life out of the coils and covers if they are still in good condition.