1 Highway W Beam guardrail 2 4320*310*85*3/4mm 3 C post, U post, round post 4 Bolts and nuts,end, spacer, cat eyes 5 Gal Guardrail & W BeamWhere Guard Rail Should Be Installed Interstates, Highways and Secondary RoadsWhen installed on interstates, highways and secondary roads, guard rail shields vehicles from natural and man-made roadside hazards that can't be removed such as trees, ditches, ...