Section 15 Base metals and articles of base metal 79 Zinc and articles thereof 79 07 Other articles of zinc 79 07 00 Tubes, pipes and tube or pipe fittings (for example couplings, elbows, sleeves) 79 07 00 40 Tubes, pipes and tube or pipe fittings (for example couplings, elbows, sleeves) Commodity Code Description 79 07 00 40 00 Tubes, pipes and tube or pipe fittings (for example couplings, elbows, sleeves)