Quad Rear Set includes two (2) fins, a Left Quad Rear and a Right Quad Rear. The FCS II Performer Glass Flex Quad Rear Fin Set is ideal for surfers who want a reliable ‘Allround’ fin delivering a combination of speed and maneuverability with flow between turns. Balance of speed, flow and response. Suitable for all conditions. NOTE: Designed to fit the FCS II Fin System only. WIll not fit the original FCS Tab system.