U.S. Customs and Border Protection · CROSS Database · 1 HTS code referenced
Primary HTS Code
3921.11.0000
$9.6M monthly imports
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Ruling Age
21 years
Data compiled from CBP CROSS Rulings, Census Bureau Trade Data · As of 2026-05-03 · Updates monthly
The tariff classification of polystyrene foam boards from China.
NY K89705 October 5, 2004 CLA-2-39:RR:NC:SP:221 K89705 CATEGORY: Classification TARIFF NO.: 3921.11.0000 Mr. Donald S. Simpson Barthco Trade Consultants 7575 Holstein Avenue Philadelphia, PA 19153 RE: The tariff classification of polystyrene foam boards from China. Dear Mr. Simpson: In your letter dated September 17, 2004, on behalf of Fibro Source USA Inc., you requested a tariff classification ruling. A sample was provided with your letter. The foam boards are composed of cellular polystyrene plastic covered on both sides with a thin layer of paper. The boards are rectangular, and will be imported in sizes of 20’’ by 30”, 22” by 28”, 11” by 14”, and 9” by 12”. The boards will be used in presentations by students or businesses. The applicable subheading for the polystyrene foam boards will be 3921.11.0000, Harmonized Tariff Schedule of the United States (HTS), which provides for other plates, sheets, film, foil and strip, of plastics: cellular: of polymers of styrene. The rate of duty will be 5.3 percent ad valorem. This ruling is being issued under the provisions of Part 177 of the Customs Regulations (19 C.F.R. 177). A copy of the ruling or the control number indicated above should be provided with the entry documents filed at the time this merchandise is imported. If you have any questions regarding the ruling, contact National Import Specialist Joan Mazzola at 646-733-3023. Sincerely, Robert B. Swierupski Director, National Commodity Specialist Division