HTS code 9902.14.81 covers "Sets of coasters of glass, not pressed or toughened (specially tempered), each printed with a cross-sectional image of an object after formation of the glass which, when the coasters in any set are stacked, depict a three-dimensional image of such object; each coaster with attached protective rubber feet and valued over $0.30 each but not over $3 each (provided for in subheading 7013.99.50) " 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.