HTS code 9902.17.80 covers "Fitness equipment designed for in-home use, each unit incorporating two independent treadmill decks with separately moving belts that rotate around a mechanical treadle and simultaneously move up and down during use, designed to allow progressive amounts of resistance and combine the functions of a treadmill, a stair climber and an elliptical machine (provided for in subheading 9506.91.00)" 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.