what balance do i need for my window

A quick learner from Harrisburg , pa. says:
I can't figure out what balance I need for my window.may e you can help me. Here are some pictures of the balance
User submitted photos of an Anderson window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. Based on your stamps, I recommend our 24-1033 Andersen sash balance.
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