Copper, unwrought or semi-wrought; copper alloys; semi-finished articles of copper or its alloys, namely, sheets, strips, rods, castings, foils, powder, and rolled, drawn or extruded semi-finished articles of copper or its alloys; non-ferrous metals and their alloys; copper wire, not insulated; tubes of copper alloys; tubes of non-ferrous metals or their alloys; non-electric wires of non-ferrous metals or their alloys