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This directory combines historical reference rows with separately labelled national sources. Read the source title, observation date, printed units and conditions on each entry. National source observations do not establish all measures applicable to a shipment.

United States Customs Tariff for HS Code 902790

Microtomes and parts and accessories thereof

USITC 2026 HTS Revision 19

26,806 official source entries are searchable. Checked 2026-09-22; edition published 2026-09-15.

Printed tariff and statistical lines from this edition, separate from historical WITS averages. Blank duty cells are not a confirmed zero. Review the parent tariff line, general and chapter notes, chapter 99, origin, exclusions, quotas and additional duties. No shipment total or special-rate eligibility is calculated. The edition publication date is not a line-level effective date.

Official schedule and source documentation

Official entries matching 902790

9027.90.20.00

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:

Microtomes

Source units: No.

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
40%
Official source for this code

9027.90.45.00

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:

Printed circuit assemblies for the goods of subheading 9027.81 or 9027.89

Source units: No.

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
40%
Official source for this code

9027.90.54.00

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:

Of electrophoresis instruments not incorporating an optical or other measuring device

Source units: kg

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
40%
Official source for this code

9027.90.56

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:

Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
40%
Official source for this code

9027.90.56.25

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: › Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

Of articles of subheading 9027.20.50

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 9027.90.56 — read its printed duties and notes

Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

  • Column 1 — General: Free
  • Column 1 — Special (eligibility required): No amount printed.
  • Column 2: 40%
Open parent line in the official schedule
Official source for this code

9027.90.56.30

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: › Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

Of articles of subheading 9027.30.40

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 9027.90.56 — read its printed duties and notes

Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

  • Column 1 — General: Free
  • Column 1 — Special (eligibility required): No amount printed.
  • Column 2: 40%
Open parent line in the official schedule
Official source for this code

9027.90.56.40

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: › Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

Of articles of subheading 9027.50.10

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 9027.90.56 — read its printed duties and notes

Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

  • Column 1 — General: Free
  • Column 1 — Special (eligibility required): No amount printed.
  • Column 2: 40%
Open parent line in the official schedule
Official source for this code

9027.90.56.50

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: › Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

Of articles of subheading 9027.50.40

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 9027.90.56 — read its printed duties and notes

Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

  • Column 1 — General: Free
  • Column 1 — Special (eligibility required): No amount printed.
  • Column 2: 40%
Open parent line in the official schedule
Official source for this code

9027.90.56.95

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: › Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

Other

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 9027.90.56 — read its printed duties and notes

Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

  • Column 1 — General: Free
  • Column 1 — Special (eligibility required): No amount printed.
  • Column 2: 40%
Open parent line in the official schedule
Official source for this code

9027.90.59

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:

Other

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
40%
Official source for this code

9027.90.59.10

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: › Other

Of articles of subheading 9027.10.20

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 9027.90.59 — read its printed duties and notes

Other

  • Column 1 — General: Free
  • Column 1 — Special (eligibility required): No amount printed.
  • Column 2: 40%
Open parent line in the official schedule
Official source for this code

9027.90.59.95

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: › Other

Other

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 9027.90.59 — read its printed duties and notes

Other

  • Column 1 — General: Free
  • Column 1 — Special (eligibility required): No amount printed.
  • Column 2: 40%
Open parent line in the official schedule
Official source for this code

9027.90.64.00

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: › Other: › Of optical instruments and apparatus:

Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

Source units: kg

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
50%
Official source for this code

9027.90.68.00

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: › Other: › Of optical instruments and apparatus:

Other

Source units: kg

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
50%
Official source for this code

9027.90.84.00

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: › Other: › Other:

Of instruments and apparatus of subheading 9027.20, 9027.30, 9027.50, 9027.81 or 9027.89

Source units: kg

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
40%
Official source for this code

9027.90.88.00

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: › Other: › Other:

Other

Source units: kg

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
40%
Official source for this code
WITS 2023 historical MFN average

Reported average: 0%.

Source year: 2023. Classification: HS 2022 (H6). Checked 2026-09-14.

National lines included: 9 of 9. Excluded from the average: 0.

Reported ad-valorem range: 0%–0%.

Reported historical ad-valorem MFN simple average for 2023, not a national tariff schedule. No preferential rates, additional duties, VAT, excise or import permissions are determined.

Not a current 2026 national duty. The HS6 average does not determine the duty of a particular national subdivision, origin or shipment.

WITS observation for this code and year

UN Comtrade H6 descriptions (HS 2022)

WITS API definitions: reported averages and excluded national lines

Direct HS code answer for United States

United States HS Code 902790: 0.00% (2023 MFN average)

The source reports an indicative HS6 MFN average of 0.00% (2023 MFN average) for Microtomes and parts and accessories thereof.Source status: not assessed. Verify the exact national tariff line, origin treatment, taxes, restrictions, and current customs guidance before using this information in a declaration.

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Customs tariff summary

Country
United States
HS / tariff code
902790
Description
Microtomes and parts and accessories thereof
Chapter
90 —
Heading
9027
Subheading
902790
Indicative MFN HS6 average
0.00% (2023 MFN average)
VAT / tax
Check local VAT and excise rules for the import destination.
Unit / basis
Not listed in this tariff line
Source / vintage
WITS / UNCTAD TRAINS — 2023 MFN HS6 reference

Historical MFN average

0.00% (2023 MFN average)

Import permission

not assessed

Import planning

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Details

HS Code
902790
Chapter
90 —
Heading
9027
Subheading
902790

Compare HS code 902790 across GCC countries

Each destination shows its own source label. Oman uses its national schedule; Qatar and UAE entries may cite their separately published references and unresolved exceptions. Other entries retain the historical GCC reference. National codes, duty notes, restrictions and tax treatment can differ; verify with the destination customs authority.

Saudi ArabiaSearch parent HS 902790United Arab EmiratesSearch parent HS 902790OmanSearch parent HS 902790QatarSearch parent HS 902790KuwaitSearch parent HS 902790BahrainSearch parent HS 902790

Related HS Codes (Heading 9027)

HS CodeDescriptionDuty
902710Instruments and apparatus; gas or smoke analysis apparatus, for physical or chemical analysis0.00% (2023 MFN average)WITS 2023 historical MFN average
902720Chromatographs and electrophoresis instruments0.00% (2023 MFN average)WITS 2023 historical MFN average
902730Spectrometers, spectrophotometers and spectrographs; using optical radiations (UV, visible, IR)0.00% (2023 MFN average)WITS 2023 historical MFN average
902750Instruments and apparatus; using optical radiations (UV, visible, IR), (other than spectrometers, spectrophotometers and spectrographs)0.40% (2023 MFN average)WITS 2023 historical MFN average
902781Instruments and apparatus; for physical or chemical analysis, for measuring or checking viscosity, porosity, expansion, surface tension or quantities of heat, sound or light, mass spectrometers0.00% (2023 MFN average)WITS 2023 historical MFN average
902789Instruments and apparatus; for physical or chemical analysis, for measuring or checking viscosity, porosity, expansion, surface tension or quantities of heat, sound or light, exposure meters0.00% (2023 MFN average)WITS 2023 historical MFN average

Data source: WITS/UNCTAD TRAINS (MFN 2022). Values are indicative HS6 MFN averages, not shipment-specific applied rates. Import permission and restrictions are not assessed. Historical reference rates exclude VAT, excise and other national measures. Separate national entries preserve the columns printed by their source; these are not a complete shipment assessment. Full disclaimer.