The 4-A has a narrow, flexible tip that enhances maneuverability and a flared base for increased stability and drive...
Amidst his wind generators, blue ocean boats, and camera housings, George Greenough had enough energy to revolutionize fin design. A seed of the revolution, the 4-A has a narrow, flexible tip that enhances maneuverability and a flared base for increased stability and drive -- an ideal combination for the point surf George fancied.
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