Section 15 Base metals and articles of base metal 73 Articles of iron or steel 73 07 Tube or pipe fittings of iron or steel 73 07 92 Having an internal diameter of less than 15 cm 73 07 92 10 Having an internal diameter of less than 15 cm Commodity Code Description 73 07 92 10 00 Having an internal diameter of less than 15 cm
