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 19 Mechano-therapy appliances; massage apparatus; psychological aptitude-testing apparatus; ozone therapy, oxygen therapy, aerosol therapy, artificial respiration or other therapeutic respiration apparatus. Commodity Code Description 90 19 10 Mechano-therapy appliances; massage apparatus; psychological apparatus;... 90 19 20 Ozone therapy, oxygen therapy, aerosol therapy, artificial respiration apparatus