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, PHOTOGRAGHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION, MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; MUSICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF 90 25 HYDROMETERS AND SIMILAR FLOATING INSTRUMENTS, THERMOMETRES, PROMETERS, 90 25 80 BAROMETERS, NOT COMBINED WITH OTHER INSTRUMENTS Commodity Code Description 90 25 80 10 BAROMETERS, NOT COMBINED WITH OTHER INSTRUMENTS 90 25 80 90 OTHER INSTRUMENTS (EG. HYDROMETERS, HYGROMETERS & PSYCHROMETERS ETC...)