6 Pipes, pipe registers, pipe bundles, ducting, all made of metal, steel, stainless steel, steel alloys, non-ferrous metals, alloys of metal, copper, aluminium, titanium or combinations of the aforesaid materials, in particular ribbed tubes, bored tubes, plain tubes, heat exchanger tubes, coaxial pipes, cooler pipes, oil cooler pipes, condenser tubes, vaporizer pipes, throttle tubes, spring pipes; pipes of metal, namely, manometer spring pipes, metal hoses, spring bellow pipes, double tubes, gas manifolds, steam tubes, liquid pipes and water pipes, and fuel pipes, lubrication pipes and coolant pipes; lubrication pipes and coolant pipes of metal; bare and insulated non-electric conduit pipes of metal, in particular of copper and copper alloys, and in particular for transporting heated or cooled media; ceiling boards of metal, floating floor boards of metal; all the aforesaid goods, in particular being for use in building technology, heating technology, cooling technology, air conditioning technology, refuelling technology and sanitary technology; doors, gates and windows of metal; common metals, unwrought or semi-wrought