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 Surgicla Instruments and Apparatus; parts and AccesoriesThereof. 90 25 Hydrometers and similar floating instruments, thermometers, pyrometers, barometers, hygrometers and psychrometers, recording or not, and any combination of these instruments 90 25 80 OTHER INSTRUMENTS: Commodity Code Description 90 25 80 10 BAROMETERS, NOT COMBINED WITH OTHER INSTRUMENTS 90 25 80 90 OTHER