FIBCs (630532) are large-volume containers designed for mechanical handling, typically with lifting loops and a capacity of several hundred kilograms. Standard polyethylene or polypropylene strip sacks and bags intended for smaller retail or industrial packing fall under 630533. The key factors are construction, capacity, and whether the article is designed for mechanical lifting.

Many lines under this heading covering synthetic-fiber bags from China are subject to Section 301 tariffs. The specific measure depends on the 10-digit tariff line and the country of origin, so importers should verify the applicable measure at the line level before entry.