Product name: Trailer hitch, trailer hook Material: Stainless steel, alloy steel, carbon steel，Ductile iron Q235, 45#steel, 40Cr, 35CrMo, 42CrMo. GGG50, GGG60, GGG70. Production process: Closed die forging, open die forging, drop forging Unit Weight: 0.5kg-200kg, 1lbs-400lbs Size scope: 50~1000mm, 2~40 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. Origin: China