FCS II H4 QUAD REAR FIN SET - NEW CONCEPT FINS FCSIIFCS II H4 FIN QUAD REAR SET MEDIUM The H4 looks and surfs different to any other fin. Precision Swiss engineering matched with a highly evolved template provides an unprecedented level of control and predictability at high speeds. Quad Rears designed to work with both medium & large H4 sets. UNIQUE TEMPLATE This set comes equipped with 2 x Quad Rear Fins, designed to work with both medium & large H4 sets. While the science behind the template,