SEVEN SURFBOARDS - Quattro The Quattro design allows for a great mix of surfing from fun to high performance. The bottom design is a single to double concave flowing into a vee in the tail. The bottom rocker is low to medium. The Quad set up works so well because it has the holding power of the two side fins without the drag of a centre back fin. Utilizing the four fin set up allows for more speed, drive and quick direction changes. It also gives the board a drivey positive feel that turns easily and has speed to burn! The Quattro is a good balance between the Twinnie and the Thruster. All these features combined with an even plan shape make for a very versatile quad surfboard. Height:6'0" Width: 19 1/4" Thickness: 2 3/16" Height:6'3" Width: 19 3/4" Thickness: 2 1/2" Height:6'6" Width: 20 1/4" Thickness: 2 5/8"