Andersen L13 balance

A quick learner from Michigan says:
October 24, 2017
My andersen window balance is marked L13/1837. On the other side of the balance is: 9 91.

I can't find that code on your website.

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Paul from SWISCO responded:
October 27, 2017
For the one side, you will want to use our 24-13L as a replacement. The opposite side will be 24-13R. How about that?
Andersen Sash Balance, 13L, 12SL
Andersen Sash Balance, 13L, 12SL
24-13L
$54.20
Andersen Sash Balance, 13R, 12SR
Andersen Sash Balance, 13R, 12SR
24-13R
$54.20
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