Common metals and their alloys; metal building materials, namely, tubes of common metal; common metal, unwrought and semi-worked, for further manufacturing and engineering; metal hardware, namely, pipes, tubes, peeled metal bars, sheets, grease nipples, steel rods, self-tapping bushings of metal, metal pipe collars, white metal pins, swage blocks, pelletized iron, and brazing rods; metal foundry chill-moulds for forming building panels, pipes, tubes, flats, frames and sheets of metal for buil...