Sub Headings of 2508
| 2508.10.00.00 | Bentonite |
| 2508.30.00.00 | Fire-clay |
| 2508.40.01. | Other clays |
| 2508.50.00.00 | Andalusite, kyanite and sillimanite |
| 2508.60.00.00 | Mullite |
| 2508.70.00.00 | Chamotte or dinas earth |
| 2508.10.00.00 | Bentonite |
| 2508.30.00.00 | Fire-clay |
| 2508.40.01. | Other clays |
| 2508.50.00.00 | Andalusite, kyanite and sillimanite |
| 2508.60.00.00 | Mullite |
| 2508.70.00.00 | Chamotte or dinas earth |