Copper pipes; Metal screws; Copper alloys; Copper wire, not insulated; Tubes of copper alloys; Copper strip; Castings, foils, powder, and rolled, drawn or extruded semi-finished articles of copper or its alloys; Zinc and its alloys; Roof coverings of metal; Roof flashing of metal; Steel in the form of sheets, plates, foils and coils; Metal fasteners, namely, bolts, nails, rivets, screws; Castings, foils, powder, and rolled, drawn or extruded semi-finished articles of lead or its alloys; Cast...