Section 15 Base metals and articles of base metal 72 Iron and steel 72 11 Flat-rolled products of iron or non-alloy steel, of a width of less than 600 mm, not clad, plated or coated. 72 11 13 Rolled on four face of a width exceeding 150 mm and thickness of not less than 4 mm.. Commodity Code Description 72 11 13 00 Rolled on four face of a width exceeding 150 mm and thickness of not less than 4 mm..