U.S. exports of Glass Microspheres Not Exceeding 1 mm in Diameter (HS 701820) totaled $5.6M in August 2026.
Importers of Glass Microspheres Not Exceeding 1 mm in Diameter paid $382K in duties in August 2026, an average duty rate of 16.30% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Glass Microspheres Not Exceeding 1 mm in Diameter imports of $2.3M in August 2026 ran 13% below the year-to-date monthly average of $2.7M.
Last updated: August 2026 dataTiny hollow or solid glass spheres measuring 1 mm or less in diameter serve as functional fillers in paints, road-marking retroreflective coatings, syntactic foams, and advanced composite materials. Austria and China are the leading US suppliers under this heading, with Germany, Canada, and Oman also contributing — a geographically diverse supply base that reflects multiple industrial production routes. All US imports are captured under the single tariff line 7018200000, and classification is primarily a size and material question: spheres exceeding 1 mm or made of non-glass materials would fall elsewhere.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
60 import shipments a month
Glass microspheres themselves are generally inert mineral articles and do not typically trigger EPA chemical import restrictions. However, if microspheres are imported pre-mixed into a paint or coating formulation, the finished product may be subject to EPA TSCA review or state VOC regulations. Importers of standalone glass microspheres should confirm the article is not a chemical substance or mixture under TSCA definitions.
The 1 mm diameter ceiling is the defining classification criterion for heading 7018.20. Importers should retain manufacturer specifications or particle size distribution data to demonstrate compliance. Spheres exceeding 1 mm in diameter would not qualify here and could fall under heading 7016.90 (hollow glass spheres for construction) or another provision depending on their form and use. CBP may request technical documentation to verify size at entry.
ImportsExports
Imports
$2.3MYoY · free account
Exports
$5.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $28.2M of Glass Microspheres Not Exceeding 1 mm in Diameter and exported $42.4M.
Through August 2026. Source: U.S. Census Bureau.
Subheading 1 of 3 in heading 7018
Subheading 701820 · $5.6M of $8.3M
Trade Directory
List your company under HS 701820 — Glass Microspheres Not Exceeding 1 mm in Diameter, so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7018200000 | Glass Microspheres not Exceeding 1 Mm in Diameter | $2.3M | 16.30% | 100.00% | $382K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7018200000 | Glass Microspheres not Exceeding 1 Mm in Diameter | $5.6M |
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.
Exports · August 2026
destination
France and United Kingdom together take 56% of it.
customs district
origin
entry
rate provision · imports
duty collected equals 16.30% of imports for consumption.