Section 18 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof 90 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof 90 21 Orthopaedic appliances; splints, etc; artificial parts of the body, etc Commodity Code Description 90 21 10 Orthopaedic or fracture appliances 90 21 21 Artificial teeth 90 21 29 Dental fittings 90 21 31 Artificial joints 90 21 39 Other artificial parts of the body (excl. artificial joints) 90 21 40 Hearing aids, excluding parts and accessories 90 21 50 Pacemakers for stimulating heart muscles, excluding parts and accessories 90 21 90 Other