| 3901 | | Polymers of ethylene, in primary forms: | | | | |
| 3902 | | Polymers of propylene or of other olefins, in primary forms: | | | | |
| 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: | | | | |
| 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: | | | | |
| 7201 | | Pig iron and spiegeleisen in pigs, blocks or other primary forms: | | | | |
| 7206 | | Iron and nonalloy steel in ingots or other primary forms (excluding iron of heading 7203): | | | | |
| 7218 | | Stainless steel in ingots or other primary forms; semi- finished products of stainless steel: | | | | |
| 7218.10.00 | 00 | Ingots and other primary forms | kg | Free | | 29% |
| 7224 | | Other alloy steel in ingots or other primary forms; semi- finished products of other alloy steel: | | | | |
| 7224.10.00 | | Ingots and other primary forms | | Free | | 28% |
| 8501.32.45 | 00 | Electric motors of a kind used as the primary source of mechanical power for electrically powered vehicles of subheading 8703.90 | No. | Free | | 35% |
