Quicksilver Black Diamond - 10.7x10 3-blade aluminum propeller (RH rotation)For good overall performance and value, the Black Diamond is your prop. While Black Diamond aluminum propellers are standard equipment on most boats with Mercury/Mariner/MerCruiser power, they are a perfect replacement for all engine brands through the use of the Quicksilver Flo Torq II hub system. The Black Diamond is recommended for use on boats with up to 250hp and with a top speed of less than 50 mph. The high quality casting and durable high-gloss Phantom Black finish make it easy to maintain & repair.Key Product Features 10.7" diameter, 10" pitch, right-hand rotation; For use with 25-30hp Mercury FourStroke engines (2022 and newer with 2.17:1 gear ratio); Aluminum with black finish; Rubber hub included with propeller; Provides the perfect balance of performance, durability and value; Perfect combination of performance, durability and value; Manufacturer part number 8M0185642; Application Information:Mercury 25 and 30 HP FourStroke outboards 2022 and newer with 2.17 ratio gearcase