Anderson Double Hung Window Sash Balancer

A quick learner from Wayne New York says:
The window size is 3046. The size of the balancer in the photo is 3inches by 6 inches. Can you guide me to the correct replacement part? The parts I see on your page - I don't see the holes for the screws to the head jamb.

Thank you !
Mary Lou
User submitted a photo of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Hello, Mary Lou. Based on your stamps, I recommend our 24-939 Andersen sash balance.
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