HTS code 3923.10.20.00 covers "Articles for the conveyance or packing of goods, of plastics; stoppers, lids, caps and other closures, of plastics › Boxes, cases, crates and similar articles › Specially shaped or fitted for the conveyance or packing of semiconductor wafers, masks or reticles of subheadings 3923.10 or 8486.90" 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.