SATI standard sprocket,plate sprocket Material: C45, A3 Hardend Teeth processing: forging hobbing, quenching. CNC machine european standard roller chain sprockets ,plate wheel, chain sprocket, taper bore sprocket, standard sprocket, idler sprocket, stainless steel sprocket, stainless Sprocket,platewheel,taper bore sprocket,standard and non-standard sprockets etc.Material: C45, A3.... according to ...