Aluminum alloys; Aluminum foil; Drain pipes of metal; Ducts of metal for air-conditioning installations; Ducts of metal for ventilating and air-conditioning installations; Hardware, namely, metal brackets for general use; Metal air conditioning ducts; Metal mounting brackets for general use; Roof coverings of metal; Roof flashing of metal; Roofing of metal, incorporating photovoltaic cells; Sheet metal; Strike plates of metal