HTS code 4504.10.20.00 covers "Agglomerated cork (with or without a binding substance) and articles of agglomerated cork › Blocks, plates, sheets and strip; tiles of any shape; solid cylinders, including disks › Insulation, coated or not coated, of compressed cork" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.