Section 15 Base metals and articles of base metal 72 Iron and steel 72 07 Semi-finished products of iron or non-alloy steel. 72 07 11 Of rectangular (including square) cross section, the width measuring less than .... 72 07 11 00 Of rectangular (including square) cross section, the width measuring less than .... Commodity Code Description 72 07 11 00 000 Of rectangular (including square) cross section, the width measuring less than ....