Tripolite Ceramic Block from Japan
Heavy-duty ceramic block made from tripolite, a siliceous fossil earth similar to diatomite, used in furnace construction. HTS 6901.00.00.00 covers such goods explicitly including 'similar siliceous earths' that are shaped and fired.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit geological source documentation proving tripolite origin as a siliceous fossil meal
• Declare exact firing temperature (>800°C) to distinguish from cured resin products excluded by Chapter notes
• Use separate invoices for mixed fossil meal/clay shipments to avoid misclassification