Anderson sash balance replacement

A quick learner from Los Angeles says:
September 30, 2017
I have several Anderson windows with broken sash cords and need help determining which parts to order. The glass size is 32.5 w and 21.75 hi.
Andersen balance
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Paul from SWISCO responded:
October 5, 2017
The number 527 you show corresponds to our balance box 24-531. Thanks for choosing SWISCO.com.
Andersen Sash Balance, 519, 523, 525, 527, 531
Andersen Sash Balance, 519, 523, 525, 527, 531
24-531
$54.20
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