6 Common metals and their alloys, unwrought or semi-wrought; metal building materials, namely, metal door frames and casings; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery in the nature of small items of metal hardware, namely, nuts, bolts, screws, washers and springs; pipes and tubes of metal; metal safes; goods of common metal, namely, gates and doors and respective parts therefor, namely, runners of metal, metal handles, metal profiled bars and connecting joints therefor, door casings of metal, metal gate stops, metal gate hooks and eyes; metal industrial gates and parts therefor, namely, runners of metal, metal handles, metal profiled bars and connecting joints therefor; gates of metal, in particular spiral gates; metal doors, namely, roller doors; gates of metal, namely, sliding gates and parts therefor, namely runners of metal, metal handles, metal profiled bars and connecting joints therefor, door casings of metal, metal gate stops, metal gate hooks and eyes