Quicksilver QA1918X Black Diamond Propeller. Features good performance and value. Easy to maintain and repair. Recommended for use on boats with up to 250 HP and with a top speed of less than 50 MPH. For use with 90 CT - 300 HP Mercury/MerCruiser engines. Made of aluminum with a high quality casting and durable high-gloss Phantom Black finish. Corrosion resistant. 14.25" diameter x 21" pitch. Right hand rotation. 3 blades.