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. Commodity Code Description 72 11 13 Rolled on four faces or in a closed box pass, of a width exceeding 150 mm and a thicknes 72 11 14 Other, of a thickness of 4.75 mm or more 72 11 19 Other 72 11 23 Containing by weight less than 0.25% of carbon 72 11 29 Other 72 11 90 Other