... 3 surface treatment :Hot dip galvanizing 4.powder coating with any colors such as green ,yellow,blue,red etc ... 7 Note: Reputable manufacturer specialized in Highway Guardrail (Crash barrier, Safety Barrier) since 1994.We are a reputable manufacturer specialized in ... complete system of Highway Guardrail (also named as Crash barrier, Safety Barrier, Road Barrier) since 1994. We are also a contractor of ...