Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers and parts and accessories of such articles 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 81 Taps, cocks, valves and similar appliances for pipes, boiler shells... 84 81 80 Of plastics, with an internal diameter of not less than 1 cm and no 84 81 80 51 Of plastics, with an internal diameter of not less than 1 cm and no Commodity Code Description 84 81 80 51 00 Of plastics, with an internal diameter of not less than 1 cm and no