The FCS II Performer Neo Glass Medium Quad Rear Fins are designed for a balance of speed, flow & response. They have a well proportioned template with Inside Foil Technology (IFT). Ideal for surfers who want a reliable 'All Round' fin delivering a combination of speed and maneuverability with flow between turns. Ideal in a wide range of conditions from beach breaks to point breaks and is recommended for all board types. This is a Quad Rear set with 2 fins.