Titanium; Brass, unwrought or semi-wrought; Copper pipes; Copper strip; Copper, unwrought or semi-wrought; Fittings of metal for furniture; Metal fasteners, namely, bolts; Metal hardware, namely, nuts; Metal hardware, namely, springs; Metal nuts; Metal screws; Metal threaded fasteners; Pipe tubes of metal; Rivets, cramps and nails of metal; Steel pipes