The FCS II Modern Keel PC AirCore Twin Fins are a more upright keel fin template which promotes quick pivotal turns. The Performance Core construction will offer a little more flex than the Performance Glass construction. This fin has a large surface area which allows you to push hard through turns without skipping out and really lay into bottom turns generating tones of drive and speed. This template is great for wider tailed, traditional fish surfboard shapes.
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.