Boss Bearing 41-6593-9A8-21 1 Lower Ball Joint Polaris Sportsman XP 850 EPS Heavy Duty Steel 2010-2012 Our Ball Joints feature heavy-duty steel cases with a POM-M90 bearing cup to isolate the ball end from the case for longer life Kit contains: (1) Ball Joint(1) Sirclip Please note: This ball joint will work on the right and/or left lower ball joints. This kit contains one ball joint, if you'd like to repair both lower please order 2.