6 Unwrought and semi-wrought common metals, namely, iron, steel, nickel, copper, brass, bronze, aluminum and magnesium; unwrought and semi-wrought common metals, namely, aluminum and aluminum alloys; unwrought and semi-wrought bars, plates, sheets, bands of common metals, namely, iron, steel, nickel, copper, brass, bronze, aluminum and magnesium; unwrought and semi-wrought bars, plates, sheets, bands of aluminum and aluminum alloys; machined, rolled, stamped, drilled, milled, ground, brushed, drawn or deep-drawn bars, plates, sheets, bands of aluminum and aluminum alloys