Hot DIP Galvanized Highway Guardrail Steel Barrier Bridge Railing. Customizable Dimensions: Thickness 2-25mm and height 300-1500mm can be customized to meet specific project requirements. OEM/ODM Support: We support OEM/ODM production, designing based on your drawings, samples, or local road standards. International Certifications: Certified by ISO9001, CE, SGS, ASTM, and RoHS, complying with AASHTO M180 and EN1317 standards. 10-Year Warranty: Comprehensive 10-year warranty coverage ensuring long-term quality and customer peace of mind. 24/7 After-Sales Support: Round-the-clock technical support available to assist with installation and maintenance issues. High Production Capacity: Factory equipped with two galvanizing and two powder-coating lines, producing 300,000 tons annually. Free Sample Provision: Small samples provided free of charge, with customer only responsible for freight costs.