HTS code 8533.40.80 covers "Electrical resistors (including rheostats and potentiometers), other than heating resistors; parts thereof › Other variable resistors, including rheostats and potentiometers › 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.