Each Solas boat propeller is balanced and precision made with superior materials for a higher strength and thinner blade that is smooth, fast, efficient and tough. Solas aluminum propellers are squeeze-cast and coated with four paint layers. The Amita 3 propeller offers a stronger blade with better performance with outstanding acceleration and top speed. 8.5 Diameter. 7 Pitch. 7-Tooth Spline. Right Hand Rotation.