Agglomerated cork tiles made from bonded cork granules fall under 4504, specifically subheading 450410 for plates, sheets, and tiles. Natural cork flooring cut directly from bark without agglomeration would fall under 4503. The key test is whether the material is reconstituted from particles or cut from solid natural cork.

Many agglomerated cork articles originating in China may be subject to Section 301 tariffs. Importers should check the specific 10-digit HTS line against the current Section 301 annexes, as applicability depends on the precise tariff classification and any granted exclusions.