Check the listing for details. FCS II Reactor Performance Core Carbon Tri Fin Set - Black / Charcoal - L - New. Condition: New. Listed at 130.00 USD. About Us | Contact Us Boardshorts Rash Guards Sandals Hats T-Shirts FCS II Reactor Performance Core Carbon Tri Fin Set - Black / Charcoal - L - New Item Details We are an authorized dealer for every item we carry. In every case, we buy directly from the manufacturer or from an authorized distributor. If you would like more detail regarding the source of this product, do not hesitate to contact us. The FCS II Reactor fin is designed for speed and tight turns, with added tail release. The upright template allows for tighter, more acute directional changes. This fin is ideal for surfers who like to perform fast, progressive turns. 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.Performance Core construction with hand laid carbon fiber designed to deliver controlled flex and enhanced base stiffness.