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HSChapter 70
U.S. imports of glass microspheres not exceeding 1 mm in diameter (HS 701820) totaled $4.2M in April 2026, traded with 12 countries.
Importers of Glass Microspheres Not Exceeding 1 mm in Diameter paid $1.1M in duties in April 2026 — an effective duty rate of 26% on $4.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Glass Microspheres Not Exceeding 1 mm in Diameter imports of $4.2M in April 2026 ran 73% above the year-to-date monthly average of $2.4M.
Last updated: April 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.
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.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CHINA | $1.9M | $212K | -$1.7M |
| AUSTRIA | $1.3M | -- | -$1.3M |
| GERMANY | $453K | $115K | -$339K |
| UNITED KINGDOM | $39K | $392K | +$352K |
| FRANCE | -- | $383K | +$383K |
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7018200000 | GLASS MICROSPHERES NOT EXCEEDING 1 MM IN DIAMETER | $4.2M | 25.73% | $1.1M |
GLASS MICROSPHERES NOT EXCEEDING 1 MM IN DIAMETER
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7018200000 | GLASS MICROSPHERES NOT EXCEEDING 1 MM IN DIAMETER | $2.0M |
GLASS MICROSPHERES NOT EXCEEDING 1 MM IN DIAMETER
382.1K kg
GLASS ARTICL. FOR CONVEYANCE/PACKING OF GOODS,NESO
HS 701090
TOUGHNED SAFETY GLASS, NOT FOR VEHICULAR USE
HS 700719
OTHER GLASSWARE, NOT LEAD CRYSTAL, NESOI
HS 701399
GLASS WOOL AND ARTICLES OF GLASS WOOL
HS 701980
REAR-VIEW MIRRORS FOR VEHICLES
HS 700910
GLASS MIRRORS, FRAMED, EXC REARVIEW
HS 700992
| State | Imports | Exports | Balance |
|---|---|---|---|
| California | $1.4M | $237K | -$1.2M |
| Texas | $644K | $332K | -$312K |
| Tennessee | $842K | $14K | -$828K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SAVANNAH, GA | $2.1M | $146K | -$2.0M |
| HOUSTON, TX | $1.1M | -- | -$1.1M |
| NORFOLK-NEWPORT NEWS, VA | $81K | $334K | +$253K |