6 Branching pipes of metal including those from alloy steel and titanium; Metal flanges; Metal hardware, namely, nuts; Pipework of metal including those from alloy steel and titanium; Rods of metal for brazing and welding including those from alloy steel and titanium; Screws of metal; Sheets of metal including those from alloy steel and titanium; Titanium and its alloys; Valves of metal other than parts of machines including those from alloy steel and titanium; Screw rings of metal