Vortex XHS aluminum boat propeller has a high gloss, black, powder coat finish that protects the aluminum from corrosion. Optimal blade thickness. Cupped trailing blade edge for better grab. Interchangeable with Mercury Flo Torq II exchangeable hub system. Vortex and XHS fit most engine applications. XHS Exchangeable Hub System absorbs impact and stress caused by shifting gears. The urethane-cushioned hub is designed to spin under significant impact, reducing the potential for costly lower unit damage, flared hub design prevents ventilation blow-out. Rotation is standard clockwise. Replaces: Evinrude/Johnson Most Mid-range outboard models from 45HP to 60HP V4 with 4-1/4 geardcase, Mercury/Mariner Most 3-cylinder, 4-cylinder and 6- In-Line Cylinder models from 60HP to 140HP. Limited Lifetime Warranty. Black in color. Dimensions: 13-1/4 inch in diameter, 17 inch Pitch with 3-blades. 1 per package.