HTS code 9902.14.72 covers "Catalytic converter needled blanket mats of ceramic fibers containing over 65 percent by weight of aluminum oxide, containing an acrylic latex organic binder of greater than 3 percent and less than 7 percent by weight, of a basis weight less than 1745 g/m2, measuring at least 5.0 mm or no more than 9.9 mm in thickness, in bulk, sheets or rolls, designed for motor vehicles of heading 8703 (provided for in subheading 6806.10.00). " 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.