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US HTS CODE | Harmonized Tariff Schedule HS code & Tariffs Search Service (2025 HTS Revision 17 (08/01/2025))
| HTS Code | 99020132 | 98178501 |
| Article Description | Entirely spherical silicon dioxide micro-spheres, certified by the importer as having mean particle size of 3 to 18 micrometers (µm), linseed oil absorption 150 to 400 ml/g, microbial count less than 100 cfu/g, mold count less than 100 cfu/g, heavy metals less than 20 ppm, surface area 300 to 800 m²/g and pore volume of 0.8 to 2.5 ml/g (CAS No. 7631-86-9) (provided for in subheading 2811.22.10) | Prototypes to be used exclusively for development, testing, product evaluation, or quality control purposes Articles classifiable in subheadings 3924.10, 3926.90, 6307.90, 6911.10, 6912.00, 7013.22, 7013.28, 7013.41, 7013.49, 8539.51, 9405.21, 9405.29, 9405.41, 9405.42, 9405.49 or 9405.50, the foregoing meeting the descriptions set forth below: |
| Quota of Quantity | -- | -- |
| Unit of Quantity | [] | [] |
| Rates of Duty (1-General) | Free | Free |
| Rates of Duty (1-Special) | No change | -- |
| Rates of Duty (2-Cuba and North Korea) | No change | The rate applicable in the absence of this heading |
| Footnotes | [{columns=[stat, units], marker=1, value=See chapter 99 statistical note 1., type=footnote}] | [{columns=[stat, units], marker=1, value=See statistical note 1 to this subchapter., type=endnote}] |
| Additional Duty | -- | -- |
| Additional Duty(products of China) | -- | -- |