Aimshine Core Carbon Surboard Fins G5 Medium Size Hiwave-01 LIGHTWEIGHT: netted fiberglass skin to make a light fin with better rigidity and more flexibility,easier to makes you turn heads. PRODUCT SIZE: Fits to any surfboard, shortboard, funboard or longboard in FCS style fins. Fin Base:4.41"/112mm; Fin Depth: 4.60"/117mm;Fin Area: 14.85sqin/9582sqmm. DESIGN:Bright and dark color combinations according to chromatology, built-in Carbon Fibre,Aimshine fins utilize the latest carbon fiber and resin transfer molding technology to give you the optimum combination to strengthen the ductility of your fins. DURABILITY: Tested and thrashed by Aimshine professional group to make sure what buyers ordered are durable enough for usage. WARRANTY GUARANTEE: Thank you for viewing Aimshine fins,we provide you a 3-month quality warranty for every buyer.