Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 14.5" Diameter x 19" Pitch Right-Hand Rotation Three Blades Aluminum Phantom Black Finish QA1916X. Overview. There's something reassuring about a propeller that just works - no fuss, no surprises, just smooth, dependable performance every time you hit the water. That's exactly what you get with the Quicksilver Black Diamond 3-Blade Aluminum Propeller. It's the kind of prop that feels right from the moment you throttle up - the boat l