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 25 Hydrometers... thermometers, pyrometers, barometers, hygrometers... 90 25 90 Parts and accessories Commodity Code Description 90 25 90 00 Parts and accessories
