Section 15 Base metals and articles of base metal 80 Tin and articles thereof 80 07 Other articles of tin. 80 07 00 Tubes, pipes and tube or pipe fittings (for example, couplings, elbows, sleeves) 80 07 00 40 Tubes, pipes and tube or pipe fittings (for example, couplings, elbows, sleeves) Commodity Code Description 80 07 00 40 00 Tubes, pipes and tube or pipe fittings (for example, couplings, elbows, sleeves)