motorcycle chain & sprockets 1/1045 carbon steel 2/black oxide and polishing 3/harden teeth 4/2,5000 kms running time Motorcycle sprocket chain wheel ... /43T…...56T etc.front sprocket12T/13T/14T/15T/16T/17T Chain 420,428,428H,520,530MaterialA3# steel(SAE Q235), 45# steel ... ,RS100,XRM,DT125,TS125,GP125,XLR,BZLP,HONDA155 SAMPLE PICTURESPackage: Motorcycle rear sprocket (C70/C50-36T)