U.S. imports of Parts and Accessories of Compound Optical Microscopes (SITC 87149) totaled $12.8M in August 2026, imported from 39 countries.
Importers of Parts and Accessories of Compound Optical Microscopes paid $1.5M in duties in August 2026, an average duty rate of 12.18% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataReplacement and upgrade components for compound optical microscopes — including objectives, eyepieces, stages, and illumination assemblies — serve the life sciences, materials analysis, and semiconductor inspection sectors. Classification under this heading turns on whether the part is dedicated to compound optical microscopes rather than electron, ion-beam, or other microscope types, a distinction that frequently triggers binding ruling requests. Importers should confirm that components marketed as "universal" accessories are not reclassified under a broader optical instruments heading at entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
899 import shipments a month
The key test is dedicated suitability: a part classifiable here must be designed or principally used with compound optical microscopes. Components that are interchangeable across electron, proton, or acoustic microscopes may fall under a different heading. Binding ruling requests to CBP are advisable for multi-use accessories.
Depending on the country of origin and specific tariff line, certain optical instrument parts may be subject to Section 301 additional duties. Importers should verify the applicable HTS 10-digit classification and origin before entry, as duty treatment can vary significantly by supplier country.
Basic heading 255 of 419 in section 8
Basic heading 87149 · $12.8M of $46.9B
Imports · August 2026
origin
Japan and Germany together supply 61% of it. China pays 37.2% duty; Germany 9.5%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$12.8MYoY · free account
Exports
$8.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $138.4M of Parts and Accessories of Compound Optical Microscopes.
Through August 2026 · exports 11 of 12 months reported. Source: U.S. Census Bureau.
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