Constant Force 1/2" 1 Hole Replacement Coil Spring #8 Long Tongue

Worked just like it is supposed to. Check to ensure you have the correct size!

After pulling my window apart and observing the cartridge at the spring was in I was able to take the broken spring out but a new spring in... Pretty easy to do... Half the money... Instead of like 15 bucks it's only seven for the spring