HTS code 9902.17.54 covers "Clear or frosted columnar globes or shades, certified by the importer as of extruded borosilicate glass; the foregoing measuring 2.54 cm or more but not over 30.48 cm in length and 2.54 cm or more but not over 20.32 cm in diameter, each with circular openings at the top and bottom, designed for use on portable non-electrical lanterns for outdoor use (provided for in subheading 9405.91.40) " 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.