Andersen Windows Sash Balancer

A handy person from New Jersey says:
I need to replace sash balancer at Andersen window.
The part number on the old balancer is: Part No:11600-17 and 11600-3
The dimensions are: 6 3/4 x 3 x 3/4.
Could you let me know the replacement part number please?
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting! The key stamp here is "9#31." With that in mind, I recommend our 24-939 Andersen sash balance.
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