Heat-Treated Pumice Granules for Water Filtration from Mexico
Heat-treated pumice granules optimized for porosity in water filtration systems and aquariums. Classified in HTS 2513.10.0080 as 'other' pumice stone, permissible even if heat-treated per heading terms. Enhances biological filtration through natural porous structure.
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
• Provide heat-treatment process documentation proving it remains natural pumice, not chemically altered
• Test for heavy metals common in volcanic pumice to meet filtration safety standards
• Distinguish from expanded perlite which falls under heading 2530 unexpanded minerals