E2 9 27P 473 balance box

A home owner from Elma, NY says:
I have a balance box with the P/N E2 9 27P 473. Could you please advise what the Swisco part number is. I need both sides.
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Paul from SWISCO responded:
With a stamp like "9 27," I recommend our 24-939 Andersen sash balance. This can be used for both sides.
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