Jon Hall Actor Obituary Category:Jon Hall (actor) Wikimedia Commons Movie TV Star Cinema Vintage postcard Jon Hall actor eBay Jon Hall Actor Jon Hall (actor) Wikipedia. Surfboard Fins M1 Grom Extra Small for Futures Thruster HEXCORE Size 1 [= Extra Small Performer] surfer weight up to 60kg fin size: 110mm high 105mm base HEXCORE + Fibreglass = Lightweight Power Curve Hexcore will take your surfing to the next level, with the perfect combination of power and speed for those seeking the advantages of superior surfboard fin performance. The stiffer flex pattern of fibreglass means you can load more power into turns with noticeably improved hold, while the lightweight hexcore interior reduces overall weight. Being fibreglass, the tip retains its responsiveness for a highly impressive level of control. Add the benefits of strength and durability and you have the ultimate combination of power and speed in a high performance yet affordable fin. Inside Foil * fins include inside foil which is desirable for increased water efficiency over the fin surface, adding lift and reducing drag. The resulting hyrdo dynamics provide what can be likened to the fin gripping the wave face when turning, the extra hold translating into speed and responsiveness just when you need it most. Includes carry pack and fin key