Window channel

A quick learner from Florida says:
How do I find out what weight channels I need?

Channel has 29 6 BX CMC 11 stamp

Is S380-30 the correct replacement?

The 19-005 and 15-005 seemed to match what I have.

Thanks
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Tom from SWISCO responded:
A stamp of 29 6 usually corresponds to our 2960 option. You can always weigh your sash to be sure.
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