Common unprocessed and semi-processed raw non-precious metals and alloys thereof, all having magnetic properties and which are sold in bulk; rolled and molten building materials, namely, tubes, sheets, strips, pieces cut to size, panels, all made of metal and having magnetic properties; ferrite in the nature of unprocessed iron sold in sheets, rods, bars and billet form; metal powders for use in further manufacture; and cobalt for use in further manufacture