Gorilla FCS II Hell Yeah PC Medium Tri Quad Fin Set. Fin Set Up: Tir-Quad Fin System: FCS II. Construction: Performance Core. FCS II x Gorilla Fin Co-Lab Series. A reliable all-round fin to cope with what ever conditions the ocean throws at you. Well rounded fin template with Inside Foil Technology (IFT) hitting the sweet spot between speed and grip. Ideal Conditions: Rips in everything from your local beachie through to pumping point breaks – FCS. Please Note: 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. Vendor style #: GHYMPC01MDFSR. Fin Specs: Size: Medium. Rider”s Weight: up to (65 – 80Kg / 145 – 175 Lbs).