| 3913 | | Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms: | | | | |
| 3913.90.10 | 00 | Chemical derivatives of natural rubber | kg | Free | | 20% |
| 4001 | | Natural rubber, balata, gutta-percha, guayule, chicle and similar natural gums, in primary forms or in plates, sheets or strip: | | | | |
| 4001.10.00 | 00 | Natural rubber latex, whether or not pre-vulcanized | kg | Free | | Free |
| 4001.21.00 | | Natural rubber in other forms: | | | | |
| 4001.22.00 | | Technically specified natural rubber (TSNR) | | Free | | Free |
| 4006.90.10 | 00 | Of natural rubber | kg | Free | | 35% |
| 4008.11.10 | 00 | Of natural rubber | kg | Free | | 25% |
| 4008.19.20 | 00 | Of natural rubber: | | | | |
| 4012.90.30 | 00 | Of natural rubber: | | | | |
| 4015.11.01 | 10 | Of natural rubber | doz.prs. | | | |
| 4015.19.05 | 10 | Of natural rubber | doz.prs. | | | |
| 4016.99.30 | 00 | Of natural rubber: | | | | |
