Channel balances 2830F

A quick learner from Pennyslvania says:
October 21, 2020
Can you identify please Does the F after 2830 make a difference . I have two different properties one has 2830 stamps one has 2830 F stamped. Both are 29" long metal channel.
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Bob from SWISCO responded:
October 26, 2020

How does our S370-29 match up? Look over all the specifications and see what you think. You would need a stamp option of 2830. 
29" Series 370 Channel Balance
29" Series 370 Channel Balance
S370-29
$11.27
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