... 3.ISO Quality Management System 4.Professional Exporter 1045 different type Industry Sprocket Specification MaterialC45, A3, 40Cr, 20CrMnTi, ... noise, smooth and steady, high strengthModel numberStandard or nonstandard (single duplex and triple)20A10-100, 40A10-100, 60A10-100 ... or customer requirement.Industry Roller Chain Sprocket-Simplex Type B Product range from simplex,duplex,triplex quadruplex ...