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SITCSection 6
U.S. imports of glassware of glass-ceramics (SITC 66521) totaled $535K in April 2026, traded with 21 countries.
Importers of Glassware of Glass-Ceramics paid $128K in duties in April 2026 — an effective duty rate of 26% on $504K in dutiable value, based on actual customs collections rather than the published tariff schedule. Glassware of Glass-Ceramics imports of $535K in April 2026 ran 44% above the year-to-date monthly average of $372K.
Last updated: April 2026 dataGlass-ceramic articles occupy a distinct material classification from conventional soda-lime or borosilicate glass, owing to their crystalline microstructure that delivers superior thermal shock resistance — a property that drives demand in cookware, bakeware, and specialty industrial applications. The controlled crystallization process used in manufacturing places these goods in a separate tariff category from ordinary glassware, which can affect duty treatment and classification decisions at entry. Importers should verify that the glass-ceramic composition is properly documented, as misclassification into adjacent household glassware headings is a common audit finding.
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Glass-ceramics are produced through a controlled crystallization process that converts an amorphous glass into a partially crystalline material. Customs classification hinges on this material distinction — not on end use — so laboratory testing or manufacturer certification of the crystalline structure is often required to support the classification.
Importers typically need a material specification sheet or technical data sheet from the manufacturer confirming the glass-ceramic composition, along with commercial invoices that explicitly describe the product as glass-ceramic rather than conventional glass. A binding ruling from CBP can provide advance certainty for high-volume shipments.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CHINA | $427K | $6K | -$422K |
| MEXICO | $11K | $198K | +$187K |
| JAMAICA | -- | $131K | +$131K |
| UNITED ARAB EMIRATES | -- | $88K | +$88K |
| CANADA | $22K | $63K | +$41K |
Monthly import values over time