HS Code for Glass microspheres

Glass microspheres are classified under HS code 7018.20, provided their diameter does not exceed 1 millimeter. This code is part of Chapter 70, which covers glass and glassware. Heading 7018 includes glass beads, imitation pearls, imitation precious or semi-precious stones, and similar glass smallwares, as well as glass microspheres. The classification of microspheres is highly dependent on their physical dimensions. These tiny spheres are often used in industrial applications, such as retro-reflective coatings for highway signs and road markings, where they reflect light back to the source. They are also used as fillers in various materials to modify density or improve flow characteristics. The Harmonized System provides a specific subheading for these items to distinguish them from larger glass beads or balls, which may have different industrial or decorative applications and thus different tariff treatments.

Products Included

• Reflective glass beads for road marking paint
• Solid glass microspheres for shot peening
• Hollow glass microspheres for lightweight fillers
• Glass beads for laboratory boiling stones
• Precision glass spheres for check valves
• Glass microspheres for use in explosives

Common Misclassification

Glass microspheres are often misclassified under HS code 7018.10, which covers glass beads, imitation pearls, and similar smallwares. However, 7018.10 is generally intended for decorative or jewelry-related items, whereas 7018.20 is the specific technical classification for microspheres under 1mm. Another error is using HS code 3206 for pigments and preparations, especially when the beads are sold mixed with paint; however, the beads themselves remain under 7018.20. If the spheres exceed 1mm in diameter, they may fall under 7002.10 (glass balls) or 7018.10 depending on their finish and purpose.

FAQ

What is the HS code for glass microspheres?

The HS code for glass microspheres not exceeding 1mm in diameter is 7018.20.

What happens if the microspheres are larger than 1mm?

If the glass spheres exceed 1mm in diameter, they are no longer classified as microspheres under 7018.20 and may be classified as glass beads under 7018.10 or as glass balls under 7002.10.