The Harmonized System (HS) Classification is a 6-digit standardized numerical method of classifying traded products. HS numbers are used by customs authorities around the world to identify products for the application of duties and taxes. Additional digits are added to the HS number by some governments to further distinguish products in certain categories. In the United States, numbers used to classify exported products are called "Schedule B" numbers. Use the tool below to find the Schedule B code or classify your product.