Green O-Ring Chain and Sprocket Kit for Polaris 330 Trail Boss 2x4 2003 2004 2005 2006 2007 2008 2009 2010 Front Sprocket: 11 Tooth Rear Sprocket : 40 Tooth O-Ring Chain: 520x78 - Green (Come with master link) Fits: 2003-2010 Polaris 330 Trail Boss 2 x 4 ATV