The NR double wall conduit is a high density polyethylene conduit designed to protect wires and telephone cables in underground installations and it has a chemical resistance to acidic and basic substances, hydrocarbons, detergents, flammable substances and water. It is made up of two tubular elements: one external corrugated element and one internal smooth element. The conduit is to be used with compatible accessories MN and PCC and it complies to the standard EN 61386.1 – EN 61386.24. The colour of the conduit is red.