spiral balance for wood sash windows

A contractor from San Diego says:
Hello,
I need spiral balances for wood sash double hung windows.Specifically need the foot that attached under the sash.

Specs:

sash weight 12 to 13.5 lbs.
Tube dia. 5/8
Tube length 22in. and 24 in.(8 each)

Do you have these?

Thanks, Jim
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Casey from SWISCO responded:
Thanks for posting, Jim! I'd recommend for you our S500-22 and S500-24, for the 22" tube and 24" tube, respectively. For each of these I would also suggest a Bottom Sash Spiral Balance Bracket, such as our 17-012.

You may want to also look through our guide on how to adjust a spiral balance on a non-tilt window.
How to Identify a Replacement Spiral Balance
How to Identify a Replacement Spiral Balance
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How to choose the proper spiral balance tip color
How to choose the proper spiral balance tip color
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How to adjust a spiral balance on a non-tilt window
How to adjust a spiral balance on a non-tilt window
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