You will receive the following: (1) 15 Tooth Front Sprocket, (1) 50 Tooth Rear Sprocket, and (1) 520-120 CZ ORH X Ring Chain. Fits 2007 2008 2009 2010 2011 2012 2013 2014 Yamaha YZ450 F. Includes masterlink. All Race-Driven Steel sprockets are manufactured to meet or exceed OEM specifications. CZ Chains are produced in the Czech Republic using German Engineering and only the highest quality products available. If you demand alot out of your Motorcycle or ATV, CZ Chains are the way to go, they will give you many years of dependable riding experience.