Highway guardrail Material: steel Q235, Q345 Surface treatment: hot dip galvanized, powder coating Size: 4320x310x85mm ;4130x310x85mm; 4320x506x85mm Shape: W beam or three wave beam Thickness: 2.5mm, 2.75mm, 3.0mm, 3.75mm, 3.85mm, 4mm Colour: Galvanzied silver or green, white, yellow, red, gray