Sbs 10" Center Fin For Longboard, Surfboard, And Sup - Free No-Tool Fin Screw Chose a size and color get a description. CLASSIC FIN TEMPLATE: This is our largest fin template, designed for center fins for longboards and paddle boards. Medium build and rake make this design the foundation for further fin template exploration. This time tested classic foil paddles easy and provides good hold in both flat water paddling and for turns and noseriding SPECIFICATIONS: Depth: 10", Base: 6.5", Rake: 28 / MATERIAL: Glass Filled Nylon COMPATIBILITY: Works on any SUP or surfboard with a standard 8.5" or 10.5" fin box. KNOWN INCOMPATIBILITIES: Some Inflatable SUPs such as the Bali Solstice, AquaMarine SPK2, see our compatibility image for more. INCREDIBLY VERSATILE: Suitable for Longboard / Surfboard / Stand Up Paddle FREE "NO TOOL" FIN SCREW: We include our No Tool fin screw and plate set so you can install this on your board right away without any tools.