Features Stainless steel blade geometry used in aluminum propellers results in superior performance; Higher efficiency equals better fuel economy, better top end, faster hole shot, and excellent cornering and handling; Vent holes in the propellers barrel allow exhaust gases to escape, reducing water density around the propellers blades during acceleration; This causes the propeller to rotate faster at slower speeds resulting in more horsepower; More horsepower at lower speeds means faster acceleration and a faster hole shot; Specifications Blade: 3; Gearcase Size: 4.25″; Size: 13.25 x 19 in.; Dimension: 6.25″ H x 13.25″ W x 14″ L; Weight: 5.6 lbs; .