9001.90.80.00—Optical fibers and optical fiber bundles; optical fiber cables other than those of heading 8544; sheets and plates of polarizing material; lenses (including contact lenses), prisms, mirrors and other optical elements, of any material, unmounted, other than such elements of glass not optically worked, halftone screens designed for use in engraving or photographic processes
General
Free
Units
No.
Column 2