The O'Brien System Wakeboard is a great first board for anyone getting into the sport and the perfect board to keep on your boat for friends who want to try their hand at wakeboarding. With an extra buoyant foam core, the System makes getting up and riding as effortless as can be. Once up, the dual channels at the tip and tail and the center-mounted fins engage to ensure smooth tracking and easy edging, delivering stability and control to the rider. As riders progress, they will appreciate the System's predictable nature and how easy it is to ride. It is the perfect board to learn on.• Continuous Rocker• Feather Core• Grab Rail• Two Removable Attack 1.4" Center Finstable, th, td {border: 1px solid black; border-collapse: collapse;}th {text-align: center;}th {padding-left: 0px;}td {text-align: center;}td {padding-left: 0px;} Length Center Width Rocker Rider Weight System 135 53.1" 16.75" 2.25" 100-180 lbs. System 140 55.1" 16.9" 2.35" 140-230 lbs. Extra buoyant foam core for effortless getting up and riding Dual channels at tip and tail ensure smooth tracking and easy edging Two removable Attack 1.4" center fins | System Wakeboard, Blank size 135