Section 15 BASE METALS AND ARTICLES OF BASE METAL 72 Iron and steel 72 10 Flat-rolled products of iron or non-alloy steel, of a width of 600 mm or more, c 72 10 11 Roofing sheets 72 10 11 10 Roofing sheets Commodity Code Description 72 10 11 10 00 -- Of a thickness of 0.5 mm or more