HTS code 9902.15.88 covers "Electromechanical cat toys, with electrical function supplying power to the moving parts and supporting the mechanical function, each unit comprising an electrical/mechanical "mouse" of plastics enclosed in an approximately 0.61 m diameter textile fabric "pouch," with such "mouse" designed to randomly move around the inside of the pouch (provided for in subheading 8479.89.94)" 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.