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 30 HEADING 90.28; INSTRUMENTS AND APPARATUS FOR MEASURING OR DECTECTING 90 30 90 PARTS AND ACCESSORIES FOR OSCILLOSCOPES,SPECTRUM ANALYSERS & OTH. INST... Commodity Code Description 90 30 90 00 PARTS AND ACCESSORIES FOR OSCILLOSCOPES,SPECTRUM ANALYSERS & OTH. INST...