Need to replace double hung Anderson window balance

A home owner from Stamford, CT says:
I need to replace the Andersen window balance. It's a double hung balance

It says on the balance as shown in the picture: 11600-17 under the Andersen Logo
BE12 9#27 7-86

Measurement : length: 6" 3/4
width: 3"
thickness: a little less than 7/8"
User submitted a photo of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Hello! The key stamp here is "9#27." With that in mind, I recommend our 24-939 Andersen sash balance.
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