Section 15 Base metals and articles of base metal 72 Iron and steel 72 14 Other bars and rods of iron or non-alloy steel, not further worked than forged, hot-rolled, hot-drawn or hot-extruded, but including those twisted after rolling. 72 14 91 Of rectangular (other than square) cross-section Commodity Code Description 72 14 91 00 Of rectangular (other than square) cross-section