Andersen window sash balancer

A quick learner from pa says:
I have an Andersen window sash balancer #11600-3 on patent number side and on cord side says #1600-2
d50 7#27 7 82. which one would replace this? thanks.
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Tom from SWISCO responded:
Good morning. I recommend that you look at our 24-737 Andersen Sash Balance. This can replace balance boxes with the stamp 7#27.
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