FIN MATERIAL PERFORMANCE GLASS. FIN SIZE SMALL/GROM (under 45Kg / 100 Lbs) -Blue, MEDIUM (65 - 80Kg / 145 - 175 Lbs) -Green. FIN SPECS SMALL/GROM (Blue) SIDE FINS: Base: 4.08" / 104mm, Depth: 4.21" / 107mm, Area: 12.97"^2 / 8368 mm^2, Sweep: 33.2 degrees
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.