The narrow streamline shape of the SE Sport Hydrofoil provides quick, precise control. The unique design eliminates the downturned trailing edge and cupped underside so there's no drag. Patented Turbo Trac's crescent shape and control tips produce improved thrust for quick plane at lower speeds, you'll experience great control and fuel savings even when towing skiers, tubes, and boards. Stainless steel mounting hardware included. 14.5" x 17".Application Notes: All outboards and sterndrives 40 HP and higher. For Volvo SX-A, DPS, DPR, DPH series and the Volvo 280 and 290 series, longer bolts and 1" fender washers are required. Will fit under Volvo's top-mounted anode by reversing the anode to wide-end forward. Not recommended for Volvo Ocean series XDP. Mounting hardware included Fits engines over 40 HP | SE Sport 300 Hydrofoil, Fits Engines Over 40 HP in White