FCS Surfboard Fins - FCS II Performer Performance Core Carbon Small Quad Rear Fin Set - Blue :: Unisex > Surf Accessories. Please Note: Designed to be used only with the FCS II Fin System. it will\n not fit in the traditional FCS Dual Plug SystemBase: 3.83\ / 97mmReliable all-round fin for a diverse range of surfers. conditions and board typesWell proportioned template with Inside Foil Technology (IFT) delivering a balance\n of drive. pivot and holdDepth: 3.99\ / 101mmArea: 11.08\² / 7150mm²Sweep: 32.47°Foil: 80/20Recommended Rider Weight: 55kg - 70kgBoard Types: Recommended for all board typesDesigned for surfers wanting a combination of speed and manoeuvrability with flow\n between turnsIdeal Conditions: A wide range of conditions from beach breaks to point\n breaks Size: one size.