HTS code 9902.13.12 covers "Acrylic staple fibers (polyacrylonitrile staple) containing 85 percent or more by weight of acrylonitrile units and 2 percent or more but not over 3 percent of water, non-pigmented (ecru), crimped, with a decitex between 1.98 and 2.42 and fiber length between 48 and 60 mm (provided for in subheading 5503.30.00)" 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.