Multi-wall shipping sacks (4819300020) are specifically engineered bags constructed from multiple plies of kraft paper, often with moisture-barrier or reinforcing layers, designed for heavy bulk goods. Other large paper bags (4819300040) covers single-ply or otherwise constructed bags meeting the 40 cm base-width threshold but not qualifying as multi-wall shipping sacks. The distinction matters for duty and quota purposes, so importers should verify ply count and construction specifications before filing.

Importers should verify whether specific supplier countries or product configurations are subject to antidumping or countervailing duty orders on paper or packaging products, as the scope of such orders can extend to converted paper goods. A licensed customs broker or trade attorney can confirm whether a particular shipment falls within the scope of any active orders.