Quicksilver 8M0150152 Flo Torq SSR Propeller Hub KitGenuine OEM Mercury-Mercruiser part.The Mercury Flo Torq SSR Hub Kit was specifically designed with Mercury FourStroke V6 engines to virtually eliminate prop rattle and shift clunk, providing a quieter boating experience. The Flo Torq SSR also works well on 75-150 horsepower FourStroke engines. For use with current Mercury/Mariner FourStroke outboards 40 CT - 225 HP (1" prop shaft).; Included: Drive sleeve; Aft adapter; Thrust washer; Prop nut kit;