| 4001.21.00 | | Natural rubber in other forms: | | | | |
| 4001.21.00 | 10 | Grade 1 | kg | | | |
| 4001.21.00 | 20 | Grade 2 | kg | | | |
| 4001.21.00 | 30 | Grade 3 | kg | | | |
| 4001.22.00 | | Technically specified natural rubber (TSNR) | | Free | | Free |
| 4001.22.00 | 05 | Grade 5 | kg | | | |
| 4001.22.00 | 10 | Grade CV | kg | | | |
| 4001.22.00 | 15 | Grade L | kg | | | |
| 4001.22.00 | 20 | Grade 10 | kg | | | |
| 4001.22.00 | 25 | Grade 20 | kg | | | |
| 4001.30.00 | | Balata, gutta-percha, guayule, chicle and similar natural gums | | Free | | Free |
| 4001.30.00 | 05 | Balata | kg | | | |
| 4001.30.00 | 10 | Gutta-percha and guttas, not elsewhere specified or included | kg | | | |
| 4001.30.00 | 15 | Jelutong or pontianak | kg | | | |
| 4001.30.00 | 25 | Leche caspi and sorva | kg | | | |
| 4002 | | Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip; mixtures of any product of heading 4001 with any product of this heading, in primary forms or in plates, sheets or strip: | | | | |
| 4002.11.00 | 00 | Styrene-butadiene rubber (SBR); carboxylated styrene-butadiene rubber (XSBR): | | | | |
| 4002.11.00 | 00 | Latex | kg | Free | | 20% |
| 4002.19.00 | 10 | Containing 50 percent or less styrene by weight of the dry polymer | kg | | | |
| 4002.19.00 | 20 | Containing over 50 percent styrene by weight of the dry polymer | kg | | | |
| 4002.20.00 | 00 | Butadiene rubber (BR) | kg | Free | | 20% |
| 4002.31.00 | 00 | Isobutene-isoprene (butyl) rubber (IIR); halo-isobutene-isoprene rubber (CIIR or BIIR): | | | | |
| 4002.41.00 | 00 | Chloroprene (chlorobutadiene) rubber (CR): | | | | |
| 4002.41.00 | 00 | Latex | kg | Free | | 20% |
| 4002.51.00 | 00 | Acrylonitrile-butadiene rubber (NBR): | | | | |
Harmonized Tariff Schedule of the United States inquiry: 3203Ã
