HTS code 9902.12.98 covers "Acrylic fiber tow containing at least 85 percent but not more than 92 percent by weight of acrylonitrile units, containing a minimum of 35 percent by weight of water, presented in the form of raw white (undyed) filament with an average filament measure between 2 and 5 decitex per filament and an aggregate measure in the tow bundle between 660,000 and 1,200,000 decitex, with a length greater than 2 meters (provided for in subheading 5501.30.00)" 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.