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 20 Containing indentations,ribs,grooves or ....rolling process or twisted after rolling Commodity Code Description 72 14 20 00 Containing indentations,ribs,grooves or ....rolling process or twisted after rolling