Coil balance

A contractor from PIttsburgh says:
September 29, 2019
I need replacement coil balances for a vinyl single hung window. It has an 8 marked on the coil. It is 1/2" wide. When extended all the way it is around 29" from the top screw that holds the coil in place to the bottom of the window sash. Can you let me know the correct replacement.
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Tom from SWISCO responded:
October 3, 2019

Hello! We can definitely supply this hardware for you. See our 15-180 pivot shoe, along with our Series 190 coil spring. You mentioned that your old spring had an 8 on it, indicating 8 pounds of support, so you'll probably want our S190-840 specifically.

If your old barrel and clip are in good condition, they can be reused. If not, see our 15-182 and 15-186, respectively.
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
840 S190 Coil Balance Spring
840 S190 Coil Balance Spring
S190-840
$11.32
Balance Bushing
Balance Bushing
15-182
$1.80
Coil Balance Clip
Coil Balance Clip
15-186
$5.05
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