Pro L4 Stainless Steel 4-Blade. 15″ x 20″. More aggressive camber design and cupping. Longer barrel and equipped with SAV (Solas Adjustable Vent). Lab finished for higher horsepower engines. Available in E Series. Ideal for Offshore, Flats and Bass Boats. Important: RBX Hub Kits are required for installation. Must order propeller and hub kit separately. Interchanges with Mercury Flo-Torque and Michigan Vortex Systems. All necessary hardware included, except for Mercury Hub Kits – reuse the original nut and cotter pins.