HS CodesXVIII · Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof90 · Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof90209020Chapter 90Copy pageOther breathing appliances and gas masks, excluding protective masks having neither mechanical parts nor replaceable filtersDescriptionOther breathing appliances and gas masks, excluding protective masks having neither mechanical parts nor replaceable filtersSubheadings902000Other breathing appliances and gas masks, excluding protective masks having neither mechanical parts nor replaceable filtersWas this page helpful?YesNoPrevious9019Mechano-therapy appliances; massage apparatus; psychological aptitude-testing apparatus; ozone therapy, oxygen therapy, aerosol therapy, artificial respiration or other therapeutic respiration apparatusNextOrthopaedic appliances, including crutches, surgical belts and trusses; splints and other fracture appliances; artificial parts of the body; hearing aids and other appliances which are worn or carried, or implanted in the body, to compensate for a defect or disability9021