Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 10" Diameter x 5" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish QA2178R. Overview. There's something rewarding about knowing your boat will do exactly what you ask of it. The Quicksilver Black Diamond 3-Blade Aluminum Propeller gives you that kind of confidence - smooth, predictable performance you can count on every time you turn the key. It's steady when you ease off the dock, sure-footed as you throttle up, and d