This Mercury Black Max Propeller is a genuine OEM part for Mercruiser engines. With a diameter of 13-3/4 inches and a pitch of 15P, this propeller is designed for maximum performance and reliability. It is compatible with a variety of Mercury engines, and its brand name ensures high quality and durability. Whether you're looking to replace a damaged propeller or simply upgrade your boat's performance, this Mercury Black Max Propeller is an excellent choice.