HTS code 9209.91.40.00 covers "Parts (for example, mechanisms for music boxes) and accessories (for example, cards, discs and rolls for mechanical instruments) of musical instruments; metronomes, tuning forks and pitch pipes of all kinds › Musical instrument strings › Parts and accessories for pianos › Tuning pins" 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.