main products:Model Number 4320*310*85*3 mm/4320*310*85*4 mmMaterial Q235(S235 JR) or Q345 (S355JR)Length 2320-4320 mmThickness 2.7-4.0 mmShape two or three wavesWe have gained many certification of our products ,such as ISO9001, SGS,Russian impacting test report , etc.Introduction:Shandong Guanxian Tongan Traffic Project Co., Ltd., established in 1996, specialized in manufacturing and exporting highway guardrail and accessories. Tong?an guardrails are successfully exported to Malaysia, Singapore, Russia, South Africa, Mozambique, Ghana, Brazil, etc.�Our mainly products include Galvanized W beam, Steel Posts (C Post, U Post, H Post, Round Post and Sigma Post, etc.), and also supply bolt and nut, washer, spacer, block and other relevant guardrail components. Client?s drawings and specifications are also available. �After 17 years of steady development, Guanxian Tong?an has rich production and construction experience in galvanized highway guardrails. Now, we have three hot-dip galvanizing lines, two electrostatic spray painting lines. The factory is covering an area of 11000 sqm, and total assets are about RMB 120 million with 400 employees, and 20 senior engineers.�Our guardrails have successively achieved the Certificate of Traffic Engineering Test Centre, China Academy of Transportation Sciences. And our factory obtained batch production permission accordingly.Our Services 1: Professional service and prompt replies will be done in 24 hours.2: Strict quality control to ensure raw materials to final package before delivery are up to standerd.3: Flexible production line meets customer&＃39;s big order demands.4: Your brands/products will be impressed after using our products.