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 07 Spark-ignition reciprocating or rotary internal combustion piston engines 84 07 31 - - Of a cylinder capacity not exceeding 50 cc Commodity Code Description 84 07 31 00 - - Of a cylinder capacity not exceeding 50 cc