Old school tinted layer glass in black/blue/white.  The Vulcan Flat Four Quads are designed for powerful, on rail surfing.   All four fins have a flat inside foil which is the preferred profile for thrust and speed.  The most notable feature however is the size of the trailing fin which stands a full 4.5" tall, equal to the height of the forward fins.  The result is a massive leap in control and maneuverability.  The Flat Fours are ideal for Fishes, planing hulls and asymetricals driven by powerful surfers.  All Glass,  *VERY LIMITED AVAILABILITY.  20 SETS WERE MADE AND THAT'S THAT.