TourAxiom/US Federal/Statutes/Hts/§ 7219.31.00HTS 7219.31.00∀4 rulesOfficial sourcegraph ↗build calculator ↗citeOf a thickness of 4.75 mm or more Rates of duty (1-General): Free Rates of duty (2): 29%← HTS 7219.24.00.60HTS 7219.31.00.10 →