Common metals and their alloys; chromium; copper, unwrought or semi-wrought; nickel; metal building materials, namely, metal building flashing, metal pillars for buildings, metal building panels in the nature of metal ceiling panels, metal door panels, metal building beams; transportable buildings of metal; goods of common metal, namely, fittings for buildings in the nature of metal window and door fittings, and metal joinery fittings; metal scaffolding, metal pipes, metal knobs, metal hooks,...