| 3903 | | Polymers of styrene, in primary forms: | | | | |
| 3904 | | Polymers of vinyl chloride or of other halogenated olefins, in primary forms: | | | | |
| 3905 | | Polymers of vinyl acetate or of other vinyl esters, in primary forms; other vinyl polymers in primary forms: | | | | |
| 3906 | | Acrylic polymers in primary forms: | | | | |
| 3907 | | Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms: | | | | |
| 3908 | | Polyamides in primary forms: | | | | |
| 3909 | | Amino-resins, phenolic resins and polyurethanes, in primary forms: | | | | |
| 3910.00.00 | 00 | Silicones in primary forms | kg | 3% | Free (A,AU,BH, CA,CL,E,IL,J,JO, K,MA,MX, P,SG) | 25% |
| 3911 | | Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms: | | | | |
| 3912 | | Cellulose and its chemical derivatives, not elsewhere specified or included, in primary forms: | | | | |
| 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: | | | | |
| 3914.00 | | Ion-exchangers based on polymers of headings 3901 to 3913, in primary forms: | | | | |
| 3914.00.20 | 00 | Cross-linked polyvinylbenzyltrimethylammonium chloride (Cholestyramine resin USP) | kg | Free | | 35% |
| 4001 | | Natural rubber, balata, gutta-percha, guayule, chicle and similar natural gums, in primary forms or in plates, sheets or strip: | | | | |
| 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: | | | | |
| 4003.00.00 | 00 | Reclaimed rubber in primary forms or in plates, sheets or strip | kg | Free | | Free |
| 4005 | | Compounded rubber, unvulcanized, in primary forms or in plates, sheets or strip: | | | | |
| 4011.10.10 | 10 | Having a rim diameter of 33.02 cm (13 inches) or less | No. | | | |
| 4011.10.10 | 20 | Having a rim diameter greater than 33.02 cm (13 inches) but not more than 35.56 cm (14 inches) | No. | | | |
| 4011.10.10 | 30 | Having a rim diameter greater than 35.56 cm (14 inches) but not more than 38.10 cm (15 inches) | No. | | | |
| 4011.10.10 | 40 | Having a rim diameter greater than 38.10 cm (15 inches) but not more than 40.64 cm (16 inches) | No. | | | |
| 4011.10.10 | 50 | Having a rim diameter greater than 40.64 cm (16 inches) but not more than 43.18 cm (17 inches) | No. | | | |
| 4011.10.10 | 60 | Having a rim diameter greater than 43.18 cm (17 inches) but not more than 45.72 cm (18 inches) | No. | | | |
| 4011.10.10 | 70 | Having a rim diameter greater than 45.72 cm (18 inches) | No. | | | |
| 4011.20.10 | 25 | For use on a rim measuring 40.6 cm or more in diameter | No. | | | |
