Quicksilver Flo-Troq II Propeller Hub Kit. Helps cushion and protect the drivetrain from most impacts. For Yamaha 150-300 HP 4-stroke outboards and Yamaha 115-250 VMAX SHO outboards that use a single-piece OEM thrust washer. Hub must be ordered separately. Includes all parts needed to use a Flo-Torq propeller with your engine.