Special weight coil spring?

Question

I have a coil spring that I do not see in your catalog. It is your Series 165. The coil sash is marked as a 9.0 and its paten #5232208. Thank you

Paul · Accepted Answer

Thanks for posting! Can you confirm what Series balance you have? That patent number you gave is more commonly used for our Series 160 coil spring. This also comes with a 9 pound weight, our S160-9, but our Series 165 does not. If you do have a Series 165, you will need to use a S165-4 and S165-5. These double up to support 9 pounds per side, which will also require a 15-204 double housing.