window sash balances

A quick learner from southwest Florida says:
January 30, 2021
The balance measures 24 inches not including the plastic ends. It also has a stamped number - 23-1 d.
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Casey from SWISCO responded:
February 1, 2021

Hello,

Take a look and compare our S377-24 channel balance with a 2310 strength option to yours. Thanks for posting! 
24" Series 377 Channel Balance
24" Series 377 Channel Balance
S377-24
$10.77
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