Window channel balance

A quick learner from Davie, FL 33325 says:
I am trying to replace a 25" window channel balance. The old one is stamped with d 24-3. Which of your channel balance stamp options would be compatible to replace mine? Mine looks similiar to the series 377 19-018 top 7 15-005 shoe.
Thanks, Steve
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Tom from SWISCO responded:
A stamp of 24-3 usually corresponds to our 2430 option. You can always also weigh your sash to be 100% sure what the best choice is.
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