Instruments and apparatus for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); instruments and apparatus for measuring or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes; parts and accessories thereof › Microtomes; parts and accessories › Parts and accessories › Of electrical instruments and apparatus › Other
General (normal trade relations)Free
Special (trade programs)—
Column 240%
As of Revision 22 (2026), effective Oct 30, 2026Source: USITC HTS ↗1 measure adds duty
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this…
Articles the product of any country, except for products described in headings 9903.01.26–9903.01.33, 9903.02.02–9903.02.91, 9903.96.01, and 9903.96.02, and except as provided for in headings 9903.01.34 and 9903.02.01, as provided for in subdivision (v) of U.S. note 2 to this subchapter
Articles the product of any country determined by U.S. Customs and Border Protection to have been transshipped to evade applicable duties under section 2 of Executive Order [Insert EO number], as amended [Compiler's note: [Insert EO Number] refers to Executive Order 14326, 90 Fed. Reg. 37963.]
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Quartz surface products, as defined in U.S. note 41(a) to this subchapter, when the product of any country not exempt under U.S. note 41(c) to this subchapter, if entered in an aggregate quantity not exceeding the quantity defined in U.S. note 41(d) to this subchapter
Quartz surface products, as defined in U.S. note 41(a) to this subchapter, when the product of any country not exempt under U.S. note 41(c) to this subchapter, if entered in an aggregate quantity exceeding the quantity defined in note 41(d) to this subchapter
Except as provided for in headings 9903.82.17 and 9903.85.68, derivative aluminum and steel articles the product of any country identified in general note 3(b), as provided for in subdivisions (c)(ix)–(x) of U.S. note 16 to this subchapter