HTS code 4805.93.20.00 covers "Other uncoated paper and paperboard, in rolls or sheets, not further worked or processed than as specified in note 3 to this chapter › Felt paper and paperboard › Weighing 225 g/m² or more › Pressboard" 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.