FCS Fins - FCS II Fatboy Performance Glass Long... Fin Material: Performance glass; Bulb-like tip holds the tail of the board in the water Ideal for on-rail surfing and extended nose riding & suited for traditional and performance longboards Features TURN & CONNECT (Seamlessly connect turns and move up and down the board) & suits most LB's with hard edges; 2+ 1 compatible FIN SPECS: FAT BOY 8" - Base: 4.72/ 120mm , Depth: 7.99"/203mm, Area: 26.74"/17251mm, FAT BOY 9" - Base: 5.30"/134mm, Depth: 9.02"/229mm, Area: 33.84"/21833mm, FAT BOY 10" - Base: 5.89/149mm, Depth: 9.99"/253mm, Area: 41.77/26950mm