Copper alloys; Corrosion-resistant metal overlays and alloys for fittings, steel plates, flanges, piping components; Drain pipes made of metal; Ducts of metal for air-conditioning installations; Elbows of metal for pipes; Elbows of metal for pipes including those from alloy steel and titanium; Fittings of metal for flexible pipes; Fittings of metal for rigid pipes; Hardware mounting system comprised of metal brackets for bath accessories and decorative hooks; Iron and steel for use as raw mat...