Under the harmonized system, lead crystal is defined by a minimum lead monoxide (PbO) content — typically 24% by weight — as specified in the relevant chapter notes. Articles below that threshold classify under the non-lead-crystal subheadings even if marketed as 'crystal.' Importers should obtain material composition documentation from the manufacturer to support correct classification.

Antidumping orders have been issued on certain glass tableware from specific countries in the past. Importers should check the current status of any active orders with CBP and the International Trade Administration, as scope and country coverage can change and may affect the specific 10-digit lines within this heading.