Building materials made wholly or principally of metal; aluminium and aluminium alloys; extruded and semi-fabricated metals and metal alloys; non-precious metals and their alloys; pipes and tubes of metal; non-electric cables and wires of common metal

Non-metallic building materials including windows, window screens, window frames, doors and door frames, fittings for windows and doors; parts and accessories for the aforesaid goods included in this class