Special weight coil spring?

A quick learner says:
March 3, 2015
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
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Paul from SWISCO responded:
March 5, 2015
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.
9 lbs Series 160 Coil Balance
9 lbs Series 160 Coil Balance
S160-09
$5.48
4 lb Series 165 Egress Coil Balance
4 lb Series 165 Egress Coil Balance
S165-4
$4.70
5 lb Series 165 Egress Coil Balance
5 lb Series 165 Egress Coil Balance
S165-5
$4.70
3/8" Coil Dual Support
3/8" Coil Dual Support
15-204
$1.88
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