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 Black.