... time according to the client's inquiry highway guardrail (crash barriers, safety barriers, road barriers)highway guardrails:normal specification : 4320 * 310 * ... China, EU,USA, AS/NZS, ETC.Post : I beam post, H beam post, Sigma post,Z post, post, Tubular Post and Cylinder post, etc.Accessories: Connector, separator, orrset ... the quality.Certificate: ISO9000:2001 and ISO14001:2001. highway guardrail