6 Common metals and their alloys for use in further manufacturing; common metal in the form of sheets, coils, strips, plates, bars, rods, slabs for further manufacturing; common metal in the form of ingots; precoated metal sheets, coils and strips, namely, prepainted metal sheets, coils and strips for further manufacturing; water tanks of metal for household, commercial and industrial purposes; water pipes of metal; water valves of metal; metal rainwater products, namely, guttering and downpipes; metal building materials, namely, guttering; excluding metal ladders, step ladders and extension ladders