non tilt balance

A quick learner from Naperville says:
Please help me identify this balance. The window is non tilt. the old balance is 3/8"diameter and 29" long. There is no color ring on the end. at the end it has a clip that I show in the attached pictures
User submitted photo of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Looks like you have a specially made S306-29 spiral balance with a 15-142 attached instead of the default clip. I would be happy to custom make this for you, I just need to know how many you need. You may also want to weigh your sash to be sure the default tip color of Red is accurate; two of these balances with Red Tips can carry a sash weight of 10 through 22 pounds.
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