Product name: Coupling pressed with bronze shell Material: Stainless steel, alloy steel, carbon steel. Ductile iron, grey iron Q235, 45#steel, 40Cr, 35CrMo, 42CrMo, GGG40, GGG50, GGG60, GGG70, GG20, GG25, GG30 Production process: Manual welding, electroslag welding, high frequency welding, GMAW, resistance welding, laser welding, plasma welding, brazing, precision machining Unit Weight: 0.1kg-1000kg, 0.22lbs-2200lbs Size scope: 5~5000mm, 0.2~200 inch Customizable or not: Yes Available service: Design optimization, OEM, precision machining, heat treatment, cnc machining, milling, drilling. Painting, powder coating, electroless nickel plating. Zinc Plating, E-coating. HDG, hot galvanizing Packing: Carton, plywood cases, pallets Certificate: ISO9001:2008 Inspection report: Dimension report. Material report including chemical contents, tensile strength, yield strength and hardness. X-ray test report, Ultrasonic test report and Magnetic particle test available upon request. Application: Sprocket is a kind of wheel with cogged chain teeth, which is used to mesh with Origin: China