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 93 Butt welding fittings of iron or steel (excl. stainless) Commodity Code Description 73 07 93 00 Butt welding fittings of iron or steel (excl. stainless) 73 07 93 10 Having an internal diameter of less than 15 cm 73 07 93 90 Other
