HTS code 9902.14.91 covers "Clad strips of silver, further worked than semimanufactured, each containing 54 percent or more but not over 56 percent by weight of silver; having three layers with one layer containing 87 percent or more but not over 89 percent by weight of silver and 11 percent or more but not over 3 percent of tin, a second layer containing 99.9 percent or more by weight of silver, and a third layer containing 14.5 percent or more but not over 15.5 percent by weight of silver, 79 percent or more but not over 81 percent of copper and 4.8 percent or more but not over 5.2 percent of phosphorus; measuring 15.65 mm in width and 0.95 mm in thickness, presented in coils (provided for in subheading 7115.90.40) " 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.