andersen window sash balancer

A quick learner from NJ says:
April 17, 2015
32 1/2 x 20 - glass to glass - double hung window

what sash balancer would I need to replace?

thanks.

-- King
User submitted a photo of a window balance.
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Paul from SWISCO responded:
April 17, 2015
Based on your stamp of 823, I recommend our 24-837 Andersen balance.
Andersen Sash Balance, 823, 827, 831, 837
Andersen Sash Balance, 823, 827, 831, 837
24-837
$54.20
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