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SITCSection 6
U.S. imports of worked slate and slate articles (SITC 66132) totaled $4.0M in April 2026, traded with 20 countries.
Importers of Worked Slate and Slate Articles paid $545K in duties in April 2026 — an effective duty rate of 16% on $3.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Worked Slate and Slate Articles imports of $4.0M in April 2026 ran 23% above the year-to-date monthly average of $3.2M.
Last updated: April 2026 dataWorked slate and agglomerated slate articles occupy a distinct niche in the natural stone trade, valued for their cleft texture, low water absorption, and durability in roofing, flooring, and cladding applications. Classification hinges on whether the product is natural slate that has been cut, shaped, or surface-treated versus agglomerated slate (crushed slate bonded with resins or cement), as the two forms can attract different duty treatment. Importers should verify whether finished articles such as roofing tiles, wall panels, or decorative objects are classified here or under more specific building-products headings. Accurate country-of-origin documentation is essential given the range of global slate-producing regions.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Rough or merely split slate falls under earlier extraction-stage headings. 'Worked' slate has been further processed — cut to shape, surface-ground, beveled, or otherwise finished — and agglomerated slate is crushed slate reconstituted with a binder. The degree of processing determines which SITC or HTS heading applies, so importers should confirm the production method with the foreign supplier before filing entry.
Both roofing tiles and decorative panels of natural or agglomerated slate generally fall within this grouping, but the specific 10-digit HTS line can differ based on dimensions, surface finish, and end use. A licensed customs broker should review product specifications to confirm the correct tariff line and applicable duty rate.
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Monthly import values over time