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)