From Chapter 25: Chapter 25
| HTS Code | Description | General Duty |
|---|---|---|
| 2508100000 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths Bentonite | Free |
| 2508300000 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths Fire-clay | Free |
| 2508400100 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths Other clays | Free |
| 2508400110 | Other clays Common blue clay and other ball clays | Free |
| 2508400120 | Other clays Decolorizing earths and fuller's earth | Free |
| 2508400150 | Other clays Other | Free |
| 2508500000 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths Andalusite, kyanite and sillimanite | Free |
| 2508600000 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths Mullite | Free |
| 2508700000 | Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths Chamotte or dinas earth | Free |