Series 150 Coil Balance

This is the SWISCO Series 150 Coil Balance, a stainless steel coil spring measuring 1/2" wide, used in tilt-in windows. Coil balances are also known as a tape balance or a constant force balance.
Before you pick one of the options below, please refer to the stamp or imprint on your original spring. That should tell you what you need. If you're still not sure, or if you have no stamp, you can ask our experts for help here.