Do not send us an email or note specifying what length chain you need. You must ORDER the correct length. BUYER must check chain length needed before ordering. Any info provided by seller regarding stock length is to the best of our knowledge, but seller is NOT responsible for chain that is ordered incorrectly. Any return for different length chain will be at buyer's expense, including shipping both ways. PLEASE check BEFORE ordering. Rear Sprocket = 43 tooth Front Sprocket = 16 tooth O-Ring Chain = 520 x 112 gold 1 Master link clip style Stock gearing for this model is 16/43 Factory Spec brand Chain has tensile strength of 8200 pounds O-ring style means it will last longer with less maintenance than conventional chains Heat-treated steel sprockets last far longer than aluminum Stock photo is used you will receive the sprockets and chain that is described Fits 2007 2012 Kawasaki Ninja ZX6R Be sure to check the tensile strength of any chain you buy. Low tensile strength chain will stretch and need to be replaced.