Black Diamond Bravo Two (17 1/2 x 23") Quicksilver RH Propeller, QA1952RThe Bravo Two aluminum propeller can only be used on your MerCruiser Bravo Two Stern Drive. The die cast process reduces the possibility of porosity in the aluminum that could create a weak point in the propeller. The propellers are hand ground then cleaned and EDP finished with Quicksilvers Phantom Black glossy enamel to protect the propeller from corrosion. The propeller features a rubber bushing on a bronze splined hub. The rubber bushing helps