HTS code 8411.21.40.00 covers "Turbojets, turbopropellers and other gas turbines, and parts thereof › Of a power not exceeding 1,100 kW › Aircraft turbines" 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.