FCS II GL Performance Core Five Surfboard Fins - Medium/BlackFCS II GL Performance Core Medium Tri Quad Fin Set. Through his numerous experiences surfing heavy waves on the North Shore, Gerry Lopez's new upright template provides speed and control through hollow powerful waves. Overview: Gerry Lopez, AKA Mr. Pipeline, showed what was possible on the infamous North Shore wave, adopting a relaxed stance while disappearing inside the hollow pit. His new fin template feels stable yet loose enough to turn smooth and