Aluminum alloy; Aluminum alloys; Corrosion-resistant metal overlays and alloys for fittings, steel plates, flanges, piping components; Fittings of metal for rigid pipes; Flagpoles being structures of metal; Metal pipe fittings; Metal pipes and metal fittings therefor; Metal poles; Steel tubes; Tool and tool accessory trays made of metal sold empty and parts and fittings therefor; Fittings of metal for pipes; Poles of metal