Series 171 Coil Balance

The Series 171 Coiled Balance Spring measures 3/4" wide. The design includes a long tongue to attach to the pivot shoe. This constant force balance is used in CertainTeed double hung window sash support systems.
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.
Series 171 Coil Balance
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