spiral spring balance

A landlord from Ohio. says:
August 8, 2021
Window #1: Spring is 5/8" diameter, 31" long with a blue tip. I also need a replacement shoe.

Window #2: Spring is 5/8" diameter, 23" long with a blue tip. I also need one, possibly two replacement shoes.

I actually have about a dozen more windows with broken springs, so if the repair of these goes well, I'll be ordering more!
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Bob from SWISCO responded:
August 12, 2021

Thanks for writing in. For the spiral balances, see our S600-31 and S600-23, both with Blue Tips respectively. For any pivot shoes you need, you might need either our 15-178 or 15-188, but ultimately you'll need to remove your old shoes and go over the dimensions to confirm if either matches. 
31" Series 600 Spiral Tilt Window Balance
31" Series 600 Spiral Tilt Window Balance
S600-31
$9.42
23" Series 600 Spiral Tilt Window Balance
23" Series 600 Spiral Tilt Window Balance
S600-23
$8.85
Pivot Lock Shoe, Brown Brake Pad
Pivot Lock Shoe, Brown Brake Pad
15-178
$3.70
Pivot Lock Shoe, 1/2" Thick, Blue Break
Pivot Lock Shoe, 1/2" Thick, Blue Break
15-188
$3.70
How to Remove a Pivot Shoe (Cutout Method)
How to Remove a Pivot Shoe (Cutout Method)
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How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
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How to Identify a Replacement Spiral Balance
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How to replace a tilt-window channel balance.
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How to remove window pivot shoes
How to remove window pivot shoes
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Anatomy of a tilt window
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How to choose the proper spiral balance tip color
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How to adjust a spiral balance on a tilt window
How to adjust a spiral balance on a tilt window
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