FIN MATERIAL PERFORMANCE CORE. FIN SIZE X-SMALL (Under 55Kg / 120 Lbs). FIN SPECS Base: 4.26" / 108mm, Depth: 4.22" / 107mm, Area: 13.03"^2 / 8405mm^2, Sweep: 32.3°, Foil: IFT. Lightweight performance fin with responsive tip flex and hydrodynamic foil o
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.