Angle irons of metal; Bars for metal railings; Common metals and their alloys; Common metals, unwrought and semi-worked, for further manufacture; Construction elements made of metal, namely, fabricated metal components for building foundations; Frames of metal for building; Grease nipples; Metal bolts; Metal chains; Metal screws; Pulleys of metal, other than for machines; Screw rings of metal; Silos of metal; Steel plates and sheets; Steel sheets; Tiles of metal for building; Titanium unwroug...