Question about replacement Sash Balancer

A handy person from New Jersey says:
September 14, 2020
I have some older Andersen Windows that I need to replace the Sash Balance in and what is stamped on the outside on one of them are these numbers J64 5#31 3 81. Which replacement balance do I need to order. Thanks...
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Casey from SWISCO responded:
September 16, 2020

Hello,

Take a look at our 24-531 Andersen sash balance that will replace the (5#31) stamp on your original balance. Thanks for posting! 
Andersen Sash Balance, 519, 523, 525, 527, 531
Andersen Sash Balance, 519, 523, 525, 527, 531
24-531
$54.20
How to replace an Andersen Window Balance
How to replace an Andersen Window Balance
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