road safety: (safety barriers,road barriers,highway guardrails) Normal specification:4320*310*85*3(4)mm,available in different sizes.Profile:W-beam thrie-beamStandard:ChinaPost:C Channel post,Tubular post,sigma post,Cylinder post and Z postAccessories:connector,separator,offset blocks,terminal ends,bracket,bolt,washer etc.Surface treatment:hot..