HTS code 4006.90.10.00 covers "Other forms (for example, rods, tubes and profile shapes) and articles (for example, discs and rings), of unvulcanized rubber › Other › Of natural rubber" 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.