... wheel gear etc.product features:1\high quality steel materials 1045(c45) steel;2\competitive price;3\shaped by CNC, more ... ,428,428H,520,530MaterialA3# steel(SAE Q235), 45# steel(SAE 1045),16Mn Heat treatmentHigh frequency quenching,heat-treated by mesh belt ... some sprockets for your reference:Package: motorcycle sprocket chain wheel GS-1