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HSChapter 90
U.S. imports of parts & accessories for non-optical microscopes & diffraction apparatus (HS 901290) totaled $9.3M in April 2026, traded with 34 countries.
Importers of Parts & Accessories for Non-Optical Microscopes & Diffraction Apparatus paid $876K in duties in April 2026 — an effective duty rate of 10% on $8.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataReplacement columns, detectors, specimen stages, and other components for electron microscopes, ion microscopes, and diffraction apparatus are captured under a single line (9012900000) — a narrow but high-value parts category serving the semiconductor, nanotechnology, and advanced materials sectors. Netherlands leads US import supply, followed by Germany and Czech Republic, mirroring the geographic concentration of non-optical microscope manufacturing in Europe. Given the extreme precision tolerances and proprietary interfaces involved, most components in this category are sourced directly from original equipment manufacturers rather than through aftermarket channels.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Components such as detectors, electron columns, and specimen stages can be imported separately under 9012.90 as parts and accessories, provided they are identifiable as designed for use with a non-optical microscope or diffraction apparatus. They do not need to accompany the complete instrument. However, importers should retain technical documentation — such as the OEM part number and instrument compatibility specifications — to support the classification at entry.
Neither the Netherlands nor Germany is currently subject to Section 301 tariffs (which target Chinese-origin goods) or to the Section 232 steel and aluminum tariffs as applied to finished precision instruments and their parts. Importers should nonetheless verify current trade remedy status with a licensed customs broker, as the regulatory environment can change.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| NETHERLANDS | $2.1M | $4.0M | +$1.9M |
| CZECH REPUBLIC | $1.8M | $3.4M | +$1.6M |
| GERMANY | $1.9M | $1.3M | -$597K |
| KOREA, SOUTH | $140K | $2.7M | +$2.5M |
| JAPAN | $1.1M | $1.2M | +$80K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 9012900000 | PTS FOR MICROSCOPES, EXC OPTICAL; DIFFRACTION | $9.3M | 10.09% | $876K |
PTS FOR MICROSCOPES, EXC OPTICAL; DIFFRACTION
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9012900000 | PTS FOR MICROSCOPES, EXC OPTICAL; DIFFRACTION | $17.9M |
PTS FOR MICROSCOPES, EXC OPTICAL; DIFFRACTION
20.3K kg
INSTR & APPL F MEDICAL SURGICAL DENTAL VET, NESOI
HS 901890
MED NEEDLES. NESOI, CATHERERS ETC AND PARTS ETC
HS 901839
ARTIFICIAL JOINTS & PARTS & ACCESSORIES THEROF,NES
HS 902139
ELECTRO-DIAGNOSTIC APPARATUS NESOI, AND PARTS ETC.
HS 901819
OZONE,OXYGEN,ETC THERAPY, RESPIRATION APPARATUS,PT
HS 901920
MEAS CHECKNG INSTRUMENT & MACH, NOT OPTICAL, NESOI
HS 903180
| State | Imports | Exports | Balance |
|---|---|---|---|
| Oregon | $2.6M | $5.3M | +$2.7M |
| Pennsylvania | $609K | $6.8M | +$6.2M |
| California | $2.5M | $3.6M | +$1.1M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEW ORLEANS, LA | $2.2M | $4.3M | +$2.2M |
| JFK INTERNATIONAL AIRPORT, NY | $1.2M | $2.6M | +$1.4M |
| CHICAGO, IL | $284K | $2.6M | +$2.3M |