HTS heading 6806
Slag wool, rock wool and similar mineral wools; exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials; mixtures and articles of heat-insulating, sound-insulating or sound-absorbing mineral materials, other than those of heading 6811 or 6812, or of chapter 69 — 12 codes under this heading, with the duty on each.
| Code | Description | General rate | Units |
|---|---|---|---|
| 6806 | Slag wool, rock wool and similar mineral wools; exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials; mixtures and articles of heat-insulating, sound-insulating or sound-absorbing mineral materials, other than those of heading 6811 or 6812, or of chapter 69 + Ch. 99 | not stated | — |
| 6806.10.00 | Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls + Ch. 99 | 3.9% | — |
| 6806.10.00.10 | Accoustical pads and boards + Ch. 99 | 3.9% (inherited from 6806.10.00) | m2 |
| 6806.10.00.20 | Batts, not exceeding 61 cm in width + Ch. 99 | 3.9% (inherited from 6806.10.00) | m2 |
| 6806.10.00.40 | Batts, exceeding 61 cm in width + Ch. 99 | 3.9% (inherited from 6806.10.00) | m2 |
| 6806.10.00.60 | Pipe coverings + Ch. 99 | 3.9% (inherited from 6806.10.00) | m2 |
| 6806.10.00.90 | Other + Ch. 99 | 3.9% (inherited from 6806.10.00) | m2 |
| 6806.20.00.00 | Exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials (including intermixtures thereof) + Ch. 99 | Free | kg |
| 6806.90.00 | Other + Ch. 99 | Free | — |
| 6806.90.00.10 | Accoustical pads and boards + Ch. 99 | Free (inherited from 6806.90.00) | m2 |
| 6806.90.00.20 | Of molded calcium silicate + Ch. 99 | Free (inherited from 6806.90.00) | m2 |
| 6806.90.00.90 | Other + Ch. 99 | Free (inherited from 6806.90.00) | kg |
8 of these lines state no rate of their own and inherit one from the line above, which is how the schedule is read. Each says which line it came from.
Additional duties may apply
12 lines here reference Chapter 99, where Section 301, Section 232 and other additional duties live. Those are charged on top of the general rate and depend on where the goods were made. What those provisions are.
Source: Harmonized Tariff Schedule of the United States, U.S. International Trade Commission (public domain). Classification and the duties that finally apply to a shipment are a licensed customs broker's call.