This propeller has a 9.875" diameter Two Blade Aluminum Propeller 9-7/8 x 11 Right-Hand Rotation and 8 Spline. The Michigan Wheel Propeller features a NAVAL brass spindle and an impact-absorbing rubber cushioned hub. Recommend for the following Boat Use: Walleye Boats, Family Cruisers, Workboats, and Houseboats, Offshore Singles, Inflatables, Aluminum Consoles, Pontoon, Ski boats. Key Features: Naval brass spindle The high-gloss black powder coat finish reduces drag and preserves the metal. Constructed of aluminum and the tenacious 15-5 stainless steel alloy Rubber cushioned hub Rubber bushing that is intended to spin freely in the event of an intense collision 8-tooth spline through-hub exhaust Enhancements to the powder coating and a beefier bushing Balanced blades with extreme precision. Fit for : 20 HP (1963-1981) (Includes Merc 200/Merc 20) Specifications: Brand: Michigan Wheel SKU: 032135 UPC: 014984004930 Weight: 4.13 LBS Material: Aluminum Pitch: 11 Blades: 2 Diameter: 9-7/8 inch Splines: 8 Tooth Spline