6 Substrates primarily of metal for supporting solar cells, photovoltaic cells and solar collectors; building materials of metal for mounting solar cells, photovoltaic cells and solar collectors; mounting frames of metal for solar cells, photovoltaic cells and solar collectors; aluminum and aluminum alloy building materials for mounting solar cells, photovoltaic cells and solar collectors; building materials of metal, namely, structural frames; building materials of aluminum and aluminum alloy, namely, structural frames