Mercury/Mariner Black Max three blade aluminum prop, 12-3/4 X 21, including the Flo-Torq II Hub Kit. More than just an aluminum propeller, the Black Max is the best three-blade aluminum prop available anywhere. And anywhere is usually where youll find it. Whenever you need good overall performance, Black Max is there. High quality die-cast three-blade aluminum in an attractive Phantom black finish. Durable and easy to maintain and repair. Equipped with Flo-Torq II hub system for the mid-range outboard. Designed to fit Mercury/Mariner 60 (Bigfoot), 75 (2 & 4 stroke), 90 (2 & 4 stroke), 100, 115 and 125 HP outboards. This is a right hand rotation prop, left-hand (counter-rotating) rotation props are not available in aluminum.