channel balance

A home owner from az says:
I have jordon non tilt windows. I have I believe 28 inch s 351 balance rods I want to make sure about the option when ordering them I think it is 2730 on the bottom of the steel it is stamped 27 3 what does this option mean and do you think I am correct in choosing the 2730 thanks al
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting, Al! Yes, the 27 3 stamp would correspond to our 2730 option, but you should weigh your window sash and compare it to the weight range shown for the 2730 to know for sure.
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