Solas® Amita 3-Blade Johnson/Evinrude 8-15hp 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 corrosion-resistant performance. State-of-the-art squeeze-casting process. Stronger and tougher than traditional die-cast propellers. Finer grain. Less porosity. Thinner yet stronger blades. Outstanding acceleration, cruising, and top speed. High-tech painting process. Item(s) will ship directly from the manufacturer; delivery options and/or shipping upgrades are unavailable. Please allow 7 business days for delivery. Contiguous 48 states only. Street address is required. Once installed, this product is not eligible for return or exchange.