Tow consists of continuous, uncut filament bundles that have not yet been cut to a defined staple length. Once the tow is cut or broken into discrete short lengths, it becomes staple fiber and classifies under a different heading. The tow's intended downstream use — whether cut into staple or processed directly — does not change its classification at the time of import.

Aramid tow (550111) may be subject to antidumping or countervailing duty orders depending on the country of origin and the specific product. Importers should check current Commerce Department and ITC orders for the applicable tariff line and origin before entry.