Series 180 Coil Balance Quote

Hello! Thanks for your patience during the busy summer season.

If you have a Series 180 spring with a 9JO stamp, then you can use our 9 lb capacity S180-09. You can always weigh your sash to verify that this is accurate. All you need to do is weigh the sash on a scale, then divide that by how many springs support it. If the result is 9, then you have a winner.