The Bonzer concept developed by the Campbell Brothers out of Ventura, California is one of the most historic innovations in surfboards. A unique cluster of 3 or 5 fins offers hydrodynamic flow like no other surfboard design. Bonzer side fins, aka "bonzer runners" come as a set of 2, long and low aspect, or set of 4, shorter and higher aspect. The bonzer center fin is offered in four sizes 6"-7" with full base and mellow rake. Either Bonzer set is sure to take you to outerspace!