The FCS II Reactor Performance Core Quad is designed with Speed & tight turns in mind, ideal for beach breaks. Geometry Well proportioned template with Inside Foil Technology (IFT) delivering a balance of drive, pivot and hold. View the FCS Fin Data page for Base/Depth/Area/Foil information. Material Performance Core Performance Core (PC) fins are made using a multi-layered resin transfer molding process. The flex pattern in PC fins extends progressively from the base through to the tip, helping the surfer to maintain drive and hold through a turn. This versatile fin material is light, and can be used in a variety of different conditions. Ideal Conditions Suitable for hollow waves, particularly good for beach breaks. Board Types Recommended for performance shortboards with moderate-to-low rocker Fin Family Reactor: Find Speed. Speed, tight turns & snaps. Size Medium (65Kg - 80Kg / 145 - 175 Lbs)Large (75Kg - 90Kg / 165 - 200 Lbs)