Mercury/Mariner Black Max three blade aluminum prop, 12 1/2 x 8. 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. Features high quality die-cast three-blade aluminum in an attractive Phantom black finish. Durable and easy to maintain and repair. These are all right hand rotation props.