Mercury/Mercruiser/Mariner Black Max Three Blade aluminum prop 14.25 x 21. Includes 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 you'll find it. Whenever you need good overall performance, Black Max is there. Designed to fit Mercury/Mariner 135, 150, 175, 200, 225, 250 HP outboards Verado 135-275HP and Mercruiser Alpha and Bravo One under 400 hp (3.0L, 4.3L, 4.3LH, 4.3L EFI, 5.0L, 5.0L EFI, 5.7L, 5.7L EFI, 350 MAG MPI). Features 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 high horsepower outboards and stern drives. This is a right hand rotation prop, left hand rotation (counter rotating) is not available in aluminum.