vinyl tilt double hung

A contractor from morrisville pa says:
i need 2 of those things in the channel that are held in with 1 screw for the lower sash to stay up. i did not see anything on the website. i have no mfr info. it is in a town house in PA about 10 years old. dimension approx 1"x3.5"x1/2" thick.
tim drewes
t l drewes home improvement
User submitted photos of a coil window balance.
Profile picture of Paul
Paul from SWISCO responded:
I can only see the cover, but it resembles our 15-204 for dual coil springs. If you agree, I think the springs themselves could be our Series 165 coil. Can you confirm? You will need to match up the numbers from the old coil springs. The pivot shoe would be our 15-191, but I recommend double checking just to be sure.
A contractor from morrisville pa says:
yup thats probably it. looks like i gotta make a trip out there.
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