SWISCO - The Replacement Hardware Authority

not sure which option to choose for channel strength

A quick learner from Florida says:
I have matched the dimensions of all of the parts of my channel to your 30" Series 380 Channel Balance, but I need help figuring out which stamp option to choose. As best as I can make it out, the stamp on my existing part reads 29 - 3 EBS1

Thanks for your help!
User submitted photos of a window balance.
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Tom from SWISCO responded:
With an option of 29-3, I recommend our 2930 option. Of course, you can always weigh your sash to confirm that this is correct.
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