BALANCE NEEDED, TWO TYPES, TWO OF EACH TYPE

A quick learner from FLUSHING says:
927 R51 2 91
R18/1337 9 91
User submitted photos of a window balance.
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Casey from SWISCO responded:
Based on the serial numbers you provided, our 24-939 and 24-R18-1337 Andersen Sash balances would be the replacement balances for you.
How to replace an Andersen Window Balance
How to replace an Andersen Window Balance
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