... .ISO Quality Management System 4.Professional Exporter 1045 different type Industry Sprocket Specification MaterialC45, A3, 40Cr, 20CrMnTi, 42CrMo, copper, ... plastic bag and outer carton box or customer requirement.Industry Roller Chain Sprocket-Simplex Type B Product range from ... , south east asia, middle east and north of america.9.Material can requested by customer such as 1045 , 20mn,Stainless ...