6307.90.50 00 – Shells for use in the manufacture of articles of subheading 9404.90.
“Shells” are articles of textile that are used in the manufacture of articles of subheading 9404.90. The shells, which are sometime called “casings”, are first filled with either feathers, down, wool, silk, or a synthetic fibre and then finished, for example, as duvets, comforters, cushions, or pillows.
The tariff item does not include finished products, such as pillowcases of heading 63.02 or cushion covers (shams) of heading 63.04.