evo.com | FCS Fins > Lay sweet lines and dig powerful carves with the FCS II Carver Glass Flex Medium Tri Fin Set. Glass Flex Glass Flex has been formulated to replicate the flex and memory properties of hand laid fiberglass. Its advantages over other composite fin materials include stiffness, a more positive flex pattern (nice tip flex, little base flex) and remarkable flex memory. The precision of the injection molding process ensures the highest accuracy in geometry in each fin produced. 3 Fins Board Types Boards with deep concaves and moderate-to-extreme rocker. FCS II Fin System This fin is designed to be used exclusively with the FCS II Fin System, and will not fit in the traditional FCS Dual Plug System. Fin Specs Base: 4.47" / Depth: 4.54" / Area: 14.96in^2 / Sweep: 37.0deg | FCS II Carver Glass Flex Medium Tri Fin Set 2024 - Medium