The FCS II Performer GF Thruster Surfboard Fin Set - Medium is a great all around fin. Recommended for all board types the FCS II Performer GF Thruster Surfboard Fin is ideal in a wide range of conditions from beach breaks to point breaks. Made of Glass Flex material the FCS II Performer GF Thruster has a well proportioned template with Inside Foil Technology (IFT) delivering a balance of drive, pivot and hold. Designed for surfers wanting a combination of speed and maneuverability with flow between turns, the FCS II Performer GF Thruster is an all-round fin for a diverse range of surfers, conditions and board types. *Please Note: this fin is designed to be used exclusively with the FCS II Fin System, and will not fit in the traditional FCS Dual Plug System.