Spiral Balance help

A quick learner from FL says:
October 28, 2021

Hi. Ive got a single-hung non-tilt window with a bad balance. It is 23" x 3/8", red. I see you have the balance but I dont see the missing the "foot" on the bottom of the window that the spiral hooks onto. Heres a photo looking up at the bottom of the sash. I couldnt find it in your catalog. Its about 2-1/2"L and 38"W. Its marked Caldwell. Do you have these too?

Thanks.

Ken

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Bob from SWISCO responded:
November 2, 2021

Hi Ken. If the outer tube is 3/8" in diameter, then you need an S400-23. For the bottom bracket, see if you could use our 17-031. Take a look and see what you think. 
Window Balance Bracket
Window Balance Bracket
17-083
$2.42
Bracket, #14
Bracket, #14
17-031
$1.35
23" Series 400 Spiral Balance
23" Series 400 Spiral Balance
S400-23
$9.98
Spiral Balance Charging Tool for Non-tilt Windows
Spiral Balance Charging Tool for Non-tilt Windows
75-005
$12.10
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How to Identify a Replacement Spiral Balance
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How to adjust a spiral balance on a non-tilt window
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