Anderson window balancer N1 11#33 3 84

A home owner from Lexington, MA says:
Need to replace balancer on an Anderson double hung window 8 over 12.

I have the part and there are stamped numbers on the metal case. They are:


N1 11#33 3 84

Don't know if that helps.
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Tom from SWISCO responded:
Thanks for posting. I recommend our 24-1133 Andersen Sash Balance. This can replace balance boxes stamped with 11#33.
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