andersen window Sash

A quick learner from Mass says:
I have two different sizes of anderson windows. The numbers on the sash are
H13 623 4-88
BR7 927 9-88

I need right and left for each ...
What sash balances do I need
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Paul from SWISCO responded:
Hello! I think the key numbers here are the middle three numbers. For the "632" balance, I recommend our 24-637. For the "927" balance, I recommend our 24-939. Each can work on both sides.
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