Polymers of propylene or of other olefins, in primary forms:
| Subheading | Description | General | Special | Other |
|---|---|---|---|---|
| 3902.10 | Polymers of propylene or of other olefins, in primary forms | — | — | — |
| 3902.20 | Polyisobutylene: | — | — | — |
| 3902.30 | Polymers of propylene or of other olefins, in primary forms | — | — | — |
| 3902.90 | Polymers of propylene or of other olefins, in primary forms | — | — | — |