Section XVIII — Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof
Subheading
900190
Other
Common commodities
Unmounted camera lens elementsTelescope reflective mirrorsOptical color filtersDiffraction grating for spectroscopyMagnifying unmounted lensesAchromatic prisms for binocularsUnmounted convex lens for projectorsFlat unmounted glass for optical testingBirefringent prisms for polarizationRefractive anamorphic unmounted lenses