Anderson Window #3046

A home owner says:
What sash balancer do I need for these windows?

Also, I have Anderson Windows #2842, and #2032 that I'm thinking about replacing before they break. Please let me know what part numbers I need.
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Paul from SWISCO responded:
Our 24-837 sash balance box would go with your "2842" window. The 24-531 balance box would go with the "2032" window. And lastly, the 24-939 Andersen sash balance box will work with your "3046" window.
How to replace an Andersen Window Balance
How to replace an Andersen Window Balance
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