Heat-Treated Pumice Gravel from Mexico
Pumice stone gravel thermally processed to enhance durability for use in concrete aggregates and water filtration systems. Classified under HTS 2513.10.00 as heat-treated pumice stone, retaining its natural abrasive properties. The treatment improves density without altering its fundamental pumice composition.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide lab analysis proving heat-treatment doesn't constitute manufacturing; declare particle size distribution for customs valuation; avoid packaging that suggests retail spa use to prevent reclassification