Feature: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 450 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 StabilizerMaterial: ABSSize: Approx. 180 x 185mm / 7.1 x 7.3inFitment: Suitable for 4-50hp outboard.Package List:2 x Hydro Stabilizer4 x Screw8 x Gasket4 x NutNote:Please allow slight error due to manual measurement. Thanks for your understanding.