Solas Amita 3-Blade Yamaha 50-130hp Aluminum Propellers utilize a state-of-the-art squeeze-casting process that makes these aluminum propellers stronger and tougher than traditional die-cast propellers. Squeeze-casting produces propellers with finer grain and much less porosity than die casting and equals thinner yet stronger blades. This provides outstanding acceleration, cruising and top-end speed. Superior coatings and a high-tech painting process ensure anti-corrosion performance. State-of-the-art squeeze-casting process Thinner and stronger than traditional die-cast props Much less porosity than die-casting Outstanding acceleration and top speed Superior coatings and painting process