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 90 21 10 Orthopaedic or fracture appliances 90 21 10 00 Orthopaedic or fracture appliances Commodity Code Description 90 21 10 00 000 Orthopaedic or fracture appliances