... frequency quenching, twice abrasive resistance as much as common sprocket;hardness5\OEM offered, only you offer the technical drawing, ... our company gain ISO9001:2008 QULITY MANAGEMENT CERTIFICATE SPECIFICATIONRear sprocket 30T/34T/35T/36T/37T/38T/39T40T/41T/42T/43T…...56T ... YLZGF,B120,AURA,KMX,K125,G7S,RS100,XRM,DT125,TS125,GP125,XLR,BZLP,HONDA155 SAMPLE PICTURESPackage: Motorcycle rear sprocket (C70/ ...