Replacement for Andersen E 10 9#27 10-84?

A quick learner from dover, de says:
need to know the replacement for a sash balance (Anderson - E 10 9#27 10-84) it has the 11600-17 on oposite side. Need it as soon as possible. Thanks
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Paul from SWISCO responded:
I recommend our 24-939. This can replace Andersen balance boxes with a stamp of 9#27.
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