Section 15 Base metals and articles of base metal 73 Articles of iron or steel 73 08 Iron/steel structures and parts thereof; plates, rods... therefor 73 08 30 Doors, window-frames and thresholds for doors of iron or steel Commodity Code Description 73 08 30 00 Doors, window-frames and thresholds for doors of iron or steel 73 08 30 10 Doors, of a thickness of 6 mm or more but not exceeding 8 mm 73 08 30 90 Other