Ores of metal; signboards of metal; barrels of metal; bolts of metal; metal nuts; screws of metal; unwrought or semi-wrought iron; unwrought or semi-wrought steel; steel wire; steel; steel pipes; steel sheets; galvanized steel sheets; stainless steels; tubes of stainless steel; unwrought or semi-wrought non-ferrous metals; nickel and its alloys; magnesium and its alloys; zinc and its alloys; titanium and its alloys; metallic materials for exclusive use in building or construction, namely, fra...