Made for high-speed fun and smooth performance, the SOLAS RUBEX HR4 Stainless Steel Interchangeable Hub 4-Blade Propeller is an excellent choice for your cruiser. This prop delivers quick and easy stern lift and acceleration. The high-rake, cupped-blade design provides exceptional thrust and a noticeable smoothness at higher speeds. And if that's not all, the SOLAS Rubex HR4 boat propeller increases your boat's top speed and fuel economy in mid-range speeds. Constructed of strong stainless steel for years of reliable use. Through-hub exhaust. Requires a RBX hub kit (not included). For use with SOLAS dual prop and B3 installations, front and rear boat propellers must both be manufactured by SOLAS. Also, they must be made of the same material: either aluminum or stainless steel but not both. Great stern lift and acceleration Increases boat's top speed Fuel economy in mid-range speeds High-rake, cupped-blade design Stainless steel construction 4-blade design