Section 15 Base metals and articles of base metal 72 Iron and steel 72 13 Iron/steel bars androds, hot-rolled, in irregularly wound coils 72 13 10 Of a circular cross-section measuring not exceeding 50 mm in diameter 72 13 10 10 Of a circular cross-section measuring not exceeding 50 mm in diameter Commodity Code Description 72 13 10 10 00 Of a circular cross-section measuring not exceeding 50 mm in diameter