Section 15 Base metals and articles of base metal 80 Tin and articles thereof 80 07 Other articles of tin 80 07 00 Tin tubes, pipes and tube or pipe fittings (for example, couplings, elbows, sleeves). 80 07 00 30 Tin tubes, pipes and tube or pipe fittings (for example, couplings, elbows, sleeves). Commodity Code Description 80 07 00 30 000 Tin tubes, pipes and tube or pipe fittings (for example, couplings, elbows, sleeves).