Features: 1.Eliminate Bow Rise: Easily eliminates cavitation and prop blowout by packing water tight above the prop. Also, these hydrofoil stabilizers eliminate bow rise, porpoising, and bouncing. 2.Reducing Drag: The hydro stabilizer outperforms ordinary flat hydrofoils by reducing drag when the hull goes on plane. Helps to reduces cavitation and poor handling. 3.Fitment: Improve planing performance and stability, suitable for use on 4?50 horsepower outboard, make the boat move at high speed and stably. 4.Easy Installation: Equipped with screws, gasket and nut, easy to install. Exquisite workmanship, pay attention to details, important accessory for yacht. 5.Plastic Material: Hydrofoil stabilizer is made of high quality ABS plastic material, safe and eco friendly, firm and sturdy, stable and wear resistant, durable. Specification: Item Type: Outboards Hydro Stabilizer_x000D_ Material: ABS_x000D_ Size: Approx. 180 x 185mm / 7.1 x 7.3in_x000D_ Fitment: Suitable for 4-50hp outboard PackageList: 2 x Hydro Stabilizer 4 x Screw 8 x Gasket 4 x Nut Note: Please allow slight error due to manual measurement. Thanks for your understanding.