... time 3.ISO Quality Management System 4.Professional Exporter 1045 different type Industry Sprocket Specification MaterialC45, A3, 40Cr, 20CrMnTi, 42CrMo, ... box or customer requirement.Industry Roller Chain Sprocket-Simplex Type B Product range from simplex,duplex,triplex quadruplex,quintuples ... ,o on.Hub style : Type A (Hubless) or Type B (Hub) or Typle C (Hub on ...