Section 18 OPTICAL, PHOTOGRAPHIC, CINEMATOGRAPHIC, MEASURING, CHECKING, PRECISION , MEDICAL OR SURGICAL INSTRUMENTS AND APPARATUS; CLOCKS AND WATCHES; M USICAL INSTRUMENTS; PARTS AND ACCESSORIES THEREOF 90 Optical, photographic, cinematographic measuring, checking, precision, medical o 90 32 Automatic regulating or controlling instruments and apparatus. 90 32 10 90 32 10 00 Commodity Code Description 90 32 10 00 00 - Thermostats 90 32 20 00 00 - Manostats 90 32 81 00 00 -- Hydraulic or pneumatic 90 32 89 00 00 -- Other 90 32 90 00 00 - Parts and accessories