# HTS 6903: Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths:

https://geopax.app/tariffs/catalog/69/6903

Source: [2026 HTS Revision 21 (October 9, 2026)](https://hts.usitc.gov/search?query=6903). Additional duties by country of origin may apply; estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 6903: Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 6903 | Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths: |  |  |  |  |
| 6903.10.00.00 |   Containing by weight more than 50 percent of free carbon | Free |  | 45% | kg |
| 6903.20.00.00 |   Containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2) | Free |  | 30% | kg |
| 6903.90.00 |   Other | Free |  | 30% |  |
| 6903.90.00.10 |     Of clay | Free |  | 30% | kg |
| 6903.90.00.50 |     Other | Free |  | 30% | kg |
|  |   II. OTHER CERAMIC PRODUCTS: |  |  |  |  |