FIN MATERIAL GREEN FLEX. FIN SIZE LARGE (75 - 90Kg / 165 - 200 Lbs). FIN SPECS Base: 4.52" / 115mm, Depth: 4.67" / 119mm, Area: 15.71"^2 / 10137mm^2, Sweep: 33 degrees. Moulded composite fin with engineered flex and tip response. This well rounded templ
The FCS system (Fin Control System) was designed by Brian A. Whitty in Elanora, Australia, and patented on November 7, 1995. It can be recognized by the 2 tabs on the fins which are designed to fit into a securing plug that attaches the fin to the board.