Replacement of Andersen Sash balances

A home owner from Plainfield says:
September 12, 2016
Hello
I need to replace my Anderson sash balances. The stamping says 11600-17 and S4 10#31 8-8. I need to replace both right and left.

Can you please recommend the appropriate replacement parts?

Many thanks!
Heather
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Tom from SWISCO responded:
September 13, 2016
I sure can, Heather. I recommend our 24-1033, which can replace all Andersen sash balances stamped with "10#31."
Andersen Sash Balance, 1027, 1031, 1033
Andersen Sash Balance, 1027, 1031, 1033
24-1033
$54.20
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How to replace an Andersen Window Balance
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