Replacing spiral balances

A handy person from NC says:
March 23, 2023
My balances are 29" long with Blue tip See pic. My pivot shoe is 2"H x 9/16" thick app and 1 1/8 wide app. the 1 1/8 isn the app with of the channel. i haven't removed anything so I can t get exact measurement. i hate to remove them until I have something to replace them. I'll have to cut the channels to get them out
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Emily from SWISCO responded:
March 24, 2023

Thanks for reaching out to us! It appears you have a tilt window spiral balance such as our Series 900 (3/8" diameter) or Series 600 (5/8" diameter). You'll need to measure the outer tube to determine which Series is the best match. 

I can't be certain about the pivot shoe without exact dimensions and seeing it removed, unfortunately. Our 15-015 comes to mind but you will ultimately need to remove your old one to confirm if this matches up or not. 
29" Series 600 Spiral Tilt Window Balance
29" Series 600 Spiral Tilt Window Balance
S600-29
$9.35
29" Series 900 Spiral Balance
29" Series 900 Spiral Balance
S900-29
$9.15
Pivot Shoe, 17/32" Thick
Pivot Shoe, 17/32" Thick
15-015
$1.55
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