SlaterDesigns surfboard fin set * Material: Carbon twill * Size: Large * Recycled P.E.T. core * FCSII compatible design * Endorfins branding * Colour: Black/Black The Endorfins has the classic shape of the fin, with a slightly smaller centre fin. The fin is made from a combination of eco-friendly and pioneering materials. These FCS II compatible fins will be a great solution for those who have FCS II boxed fins and need a screw-in fin. These Endorfin’s have grub screws. These surfboard fins are constructed from a Carbon Fibre Twill and a non-woven carbon veil. The core is made of recycled P.E.T. This gives it a flexible pattern that allows for you to rip through turns. The fins are made from recycled materials and screwed in. This will help reduce fin loss. These fins, which are light enough to float, should last forever. You should never have them fall off your board.