Window balance 37DS PB 46, 1/2 inch wide, 38" length

A home owner from jersey city says:
January 25, 2017
Can you help me identify this balance? We need 18 for 9 windows. This condo was built in 2004 in Jersey City. I have attached 4 pics. Let me know if you need other info.
Best to communicate via e-mail.
Thanks!
User submitted photos of a window balance.
A home owner from jersey city says:
January 25, 2017
Incidentally, these are non-tilt windows.
Thanks again!
Profile picture of Paul
Paul from SWISCO responded:
February 1, 2017
We may be able to help. This looks a lot like our S390-38 channel balance, however your spring strength looks extra strong. Is this for the lower sash or upper sash?
38" Series 390 Channel Balance
38" Series 390 Channel Balance
S390-38
$13.45
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