Andersen Window Balance 4P19

A quick learner from morisville, pa says:
anderson window balance with #B224P19576 engraved in one corner
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Bob from SWISCO responded:

Thanks for posting. If '4P19' is stamped on the balance, then see our 24-431 Andersen Sash Balance. This is meant to replace balance boxes that include the number 419 (or 4P19). 

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