1、With 3 sharp blades, it can quickly cut the water surface and advance forward. When the blade is propelled under the water, the resistance of the blade is almost zero, and it can quickly cut the water surface and advance forward. 2、The joints of the propeller blades are made of pure copper with 14 spline teeth to better match the engine speed, allowing your outboard to charge faster on the water. 3、Forged from marine‑grade stainless steel, the surface has been polished, smooth and clean, very hard, salt‑resistant, corrosion‑resistant and durable. Even if it is soaked in sea water for a long time, the propeller blades will not be damaged. 4、After a long time of use, the blades will become smoother and brighter. The damaged and worn propeller blades can be replaced or repaired. Better propulsion performance can be used for your outboard engine. 5、Each one undergoes a drive test to ensure true performance and verify that each design meets the high quality and high standards. Item Type: Propeller Material: Stainless SteelNumer of Spline Tooth: 14 Dlameter: Approx. 9 1/4in (23.5cm) Pitch: Approx. 9in/23cm Blade: 3 Rotation: RH Bush Type: Stainless Steel Fitment: Fit for OUTBOARD 9.9-20HP Engine Fit for 2-1/2in Gearcase Fit for 9.9 CT/Bigfoot Model Year 2005 and Newer Fit for 15/20 HP 4-Stroke 2007 and Newer 1 x Propeller