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HSChapter 90
U.S. imports of mounted prisms, mirrors & other optical elements, nesoi (HS 900290) totaled $27.4M in July 2026, traded with 49 countries.
Importers of Mounted Prisms, Mirrors & Other Optical Elements, NESOI paid $2.9M in duties in July 2026 — an effective duty rate of 12% on $24.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Mounted Prisms, Mirrors & Other Optical Elements, NESOI imports of $27.4M in July 2026 ran 14% above the year-to-date monthly average of $24.1M.
Last updated: July 2026 dataMounted prisms, mirrors, and other optical elements not elsewhere specified serve critical roles in laser systems, defense optics, semiconductor lithography, and precision measurement instruments. Germany, Japan, and Switzerland — three countries with deep traditions in precision optics manufacturing — collectively dominate US imports under this heading. The US schedule subdivides the heading into mounted prisms (9002902000), mounted mirrors (9002904000), mounted lenses for closed-circuit TV cameras without motors (9002908500), and other optical elements (9002909500), among others, making correct sub-classification essential for mixed shipments. Goods of Chinese origin may be subject to Section 301 tariffs.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.2K shipments/mo
Unmounted optical elements — those not set in a frame, housing, or mechanical assembly — are classified under heading 900190, while elements that have been mounted in a frame or mechanical support are classified under 900290. The mounting status at the time of importation is determinative; an element shipped loose in packaging without a mechanical mount is unmounted even if it will later be assembled into an instrument.
These three countries host the world's leading manufacturers of high-precision optical systems — including companies specializing in laser optics, metrology, and defense applications — where mounted optical assemblies require tight tolerances and proprietary coating technologies. The concentration reflects decades of investment in optical engineering infrastructure and skilled labor that is difficult to replicate quickly elsewhere, creating supply-chain concentration risk for US importers dependent on single-source precision components.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 9002909500 | Optical Elements, NESOI | $19.4M | 10.88% | 87.43% | $2.1M |
| 9002904000 | Mirrors Mounted, NESOI | $5.7M | 10.25% | 93.64% | $579K |
| 9002902000 | Prisms Mounted, NESOI | $1.9M | 11.29% | 84.40% | $214K |
| 9002908500 | Mnt Lens, Closed-Cir Tv Cameras W/O Motors, NESOI | $446K | 10.19% | 87.48% | $45K |
| 9002907000 | Halfton Screen for Engraving/Photographic Process | $14K | 22.56% | 100.00% | $3K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9002900000 | Prism, Mirrors, Mounted & Parts & Accessorie, Neso | $27.2M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$27.4MYoY · Pro
Exports
$27.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Germany and Japan together supply 50% of it.
customs district
destination
entry
rate provision · imports
10.9% enters free of duty; the effective duty rate is 10.77%.