Coil Balance Identification Assistance Needed

A home owner from Linden, NJ says:
January 18, 2023
I am trying to identify the coil balance in my window so that I can replace them. I have attached pictures to this message. There are no identifying tags on either of the window panes or window frame. This is a double hung window. The weight of the pane is 10 pounds. If any additional information is required, I can provide it. Thank you for any assistance that you can provide so that I may purchase the correct parts from you.
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Emily from SWISCO responded:
January 19, 2023

Thanks for reaching out to us! Your pivot shoe appears to be an older version of our 15-180 which is designed to use the Series 190 coil springs. With a sash weight of 10 pounds, you can use (1) S190-540 5-pound spring on each side of the window. 

Let me know if you have any questions!
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
540 S190 Coil Balance Spring
540 S190 Coil Balance Spring
S190-540
$9.74
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