Anderson Window sash balance replacement

A quick learner from Mason, Michigan says:
Please help me identify the correct replacement sash balances for 2 identical windows. The stamping on the sash balance is BJ14 5#19 8 B7,
which are from windows installed in 1988.


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Tom from SWISCO responded:
I recommend our 24-531 Andersen sash balance. This can replace balance boxes stamped with "5#19."
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