HTS code 4804.31.60.00 covers "Uncoated kraft paper and paperboard, in rolls or sheets, other than that of heading 4802 or 4803 › Unbleached › Other" 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.