... Material: C45, A3 Hardend Teeth processing: forging hobbing, quenching. CNC machinechain coupling,sprocket (35B 18T)KANA standard ... , stainless Sprocket,platewheel,taper bore sprocket,standard and non-standard sprockets etc.Material: C45, A3.... according to ISO, ... for all kinds of sprockets, European standard series and American standard series.standard sprocket, idler sprocket, stainless steel ...