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 18 Instruments and appliances used in medical, surgical, dental... Commodity Code Description 90 18 11 Electro-cardiographs 90 18 12 Ultrasonic scanning apparatus 90 18 13 Magnetic resonance imaging apparatus 90 18 14 Scintigraphic apparatus 90 18 19 Other electro-diagnostic apparatus 90 18 20 Ultra-violet or infra-red ray apparatus 90 18 31 Syringes, with or without needles 90 18 32 Tubular metal needles and needles for suturs 90 18 39 Other syringes, needles, catheters, cannulae, and the like 90 18 41 Dental drill engines, whether or not combined or single base with other dental equipment 90 18 49 Dentists' chairs incorporating dental equipment 90 18 50 Other ophthalmic instruments and appliances 90 18 90 Other instruments and appliances