HTS code 4411.92.30.00 covers "Fiberboard of wood or other ligneous materials, whether or not bonded with resins or other organic substances › Of a density exceeding 0.8 g/cm3 › Not mechanically worked or surface covered › Not surface covered (except for oil treatment) › Tileboard which has been continuously worked along any of its edges and is dedicated for use in the construction of walls, ceilings or other parts of buildings" 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.