| 4001.21.00 | | Natural rubber in other forms: | | | | |
| 4001.22.00 | | Technically specified natural rubber (TSNR) | | Free | | Free |
| 4001.30.00 | | Balata, gutta-percha, guayule, chicle and similar natural gums | | Free | | Free |
| 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): | | | | |
| 4002.19.00 | 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): | | | | |
| 4002.31.00 | 00 | Isobutene-isoprene (butyl) rubber (IIR) | kg | Free | | 20% |
| 4002.41.00 | 00 | Chloroprene (chlorobutadiene) rubber (CR): | | | | |
| 4002.51.00 | 00 | Acrylonitrile-butadiene rubber (NBR): | | | | |
| 4002.60.00 | 00 | Isoprene rubber (IR) | kg | Free | | 20% |
| 4002.70.00 | 00 | Ethylene-propylene-nonconjugated diene rubber (EPDM) | kg | Free | | 20% |
| 4002.80.00 | 00 | Mixtures of any product of heading 4001 with any product of this heading | kg | Free | | 20% |
| 4003.00.00 | 00 | Reclaimed rubber in primary forms or in plates, sheets or strip | kg | Free | | Free |
| 4004.00.00 | 00 | Waste, parings and scrap of rubber (other than hard rubber) and powders and granules obtained therefrom | kg | Free | | Free |
| 4005 | | Compounded rubber, unvulcanized, in primary forms or in plates, sheets or strip: | | | | |
| 4005.10.00 | 00 | Compounded with carbon black or silica | kg | Free | | 20% |
| 4005.20.00 | 00 | Solutions; dispersions other than those of subheading 4005.10 | kg | Free | | 20% |
| 4005.91.00 | 00 | Plates, sheets, and strip | kg | Free | | 20% |
| 4006 | | Other forms (for example, rods, tubes and profile shapes) and articles (for example, discs and rings), of unvulcanized rubber: | | | | |
Harmonized Tariff Schedule of the United States inquiry: 3203Ã
