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 20 Tubes, pipes and tube or pipe fittings (for example, couplings, elbows, sleeves) Commodity Code Description 79 07 00 20 000 Tubes, pipes and tube or pipe fittings (for example, couplings, elbows, sleeves)