6 Metal pipes and tubes; metal tubing, namely, metal tube lines and hose lines; metal hose fittings, metal pipe fittings, ring-shaped fittings of metal and metal couplings for use with tubes and hoses; metal tube and hose fittings, namely, end caps; metal couplings for use with tubes, pipes and hoses, namely, flange couplings; metal connectors for use with tubes, pipes, hoses, namely, push-in connectors, plug-in connectors and screw connectors; metal valves, not being parts of machines; metal tube, pipe and hose fittings, namely, couplings, plugs, thread adaptors, adaptors, manifolds, blanking plugs, screw plugs, nuts, male nuts, stud adaptors, reducers, connecting screws couplings; metal tube, pipe and hose fittings, namely, couplings, plugs, thread adaptors, adaptors, manifolds with integrated valve for testing and filling; all aforementioned goods being of metal and all being included in this class; ironmongery and small items of metal hardware, namely, metal screws, metal nuts, metal male nuts, metal washers and metal bolts; reservoirs of metal for air or liquids; metal tubing, namely, electrically heated tube lines and electrically heated hose lines and pertaining structural parts, namely, electrically heated metal plugs, thread adaptors and adaptors; metal tubing, namely, tube lines heated by liquids and hose lines heated by liquids and pertaining parts, namely, metal plugs, thread adaptors and adaptors heated with liquids