Andersen D2 8#31 3 84 sash balance

A handy person from New Jersey says:
Hi,

Can you please tell me which part I need to order. I have an Andersen window from the 1980's.
The numbers on the sash balance are D2 8#31 3 84 and 11600-17.

Thanks.
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Donna from SWISCO responded:
You need the SWISCO part 24-837 to replace this Andersen balance.

Let me know if you have any further questions.
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