Andersen sash balance

A contractor from CT says:
Good morning! I need to replace an Andersen sash balancer with the numbers 11600-2 and D12 7#27 580 printed in it. I just want to be certain I am ordering the correct match.
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Paul from SWISCO responded:
I recommend our 24-737. This can replace Andersen balance boxes with the stamp 7#27.
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