Industrial Sprocket 1)Material:C45 steel, Cast Iron 2)Standard:DIN,ANSI, ... ,JIS 3)Processing:Forgin-Machining-Hobbing sprockets and platewheels,ASA sprocket and platewheels,finished bore sprockets,stainless steel sprockets,taper bore ... sprockets,double single sprockets,ASA standard sprockets. sprockets, chain sprockets industrial sprocket