FIN MATERIAL PERFORMANCE GLASS. FIN SIZE SP* for specific surfboard designs or as specialised fins. FIN SPECS FRONT: Base: 4.40" / 112mm, Depth: 4.94" / 125mm, Area: 17.98"^2 / 11600mm^2, Sweep: 31.5 degrees, Foil: Flat. REAR: Base: 3.44" / 87mm, Depth:
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.