Paul from SWISCO responded:
October 3, 2017
Thanks for writing in. Our S745-26 balance would make a good match for you. As for the option, if your balance should have any numbers stamped on it, please provide us with that information so that we can inform you which option would be the one to choose. If it should not have any numbers stamped on the balance at all, the only to confirm the best option for you would be to weigh your window sash and correspond that number to our sash weight range chart on the product page.
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