Alumina Refractory Kiln Shelf from Mexico
Flat, fired ceramic shelf made predominantly of alumina for supporting pottery in high-temperature kilns up to 1800°C. Designed as a constructional component in kiln interiors to resist thermal shock and chemical attack. Classified under HTS 6902.20.50.10 due to >50% alumina content and refractory properties post-firing.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include test reports per ASTM standards showing low water absorption and high firing temp to confirm Chapter 69 eligibility
• Label shipments clearly as 'refractory constructional goods' to prevent confusion with decorative tiles (6907-6914)
• Check for minimum thickness; US note excludes tiles ≥3.2cm thick from certain headings but applies here as refractory