Window pivot parts (bar and lock)

A quick learner from Pittsburgh, PA says:
The lock and bar broke on both sides of my double hung window. I need replacement parts and your advice please.
Pivot bar and coil assembly
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Paul from SWISCO responded:
Hi there. Our 15-177 coil balance shoe may be what you are looking for. It goes along with our Series 152 coil springs. Your pivot bar could be either our 26-226 or 26-352. We'd like for you to compare those two parts with an undamaged pivot bar to see which of the two would make the better match.
A quick learner from Pittsburgh, PA says:
This is great! Thanks so much for your response. How would I choose a balance weight (3 lb, 4 lb, etc)?
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Paul from SWISCO responded:
You will need to remove the coil springs and the spring stamp weight is stamped on it.
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