... running;4\heat-treated by mesh belt furnace or high frequency quenching, twice abrasive resistance as much as common sprocket;5 ... # steel(SAE Q235), 45# steel(SAE 1045),16Mn Heat treatmentHigh frequency quenching,heat-treated by mesh belt furnace and carburizingSurface finishingPlate ... ,RS100,XRM,DT125,TS125,GP125,XLR,BZLP,HONDA155 SAMPLE PICTURESPackage: Motor front sprocket