replacement Andersen balances

A quick learner from NY says:
What would the current number for the balancers in the attached photos? They are approx. 25 yrs. old. I'll need 4. Thanks
User submitted photos of an Andersen window balance.
Profile picture of Tom
Tom from SWISCO responded:
I recommend our 24-1231, which can replace Andersen sash balances stamped with 12#27.
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