NAICS 32721 breaks into four six-digit industries: drawn/blown, float, and flat glass (327211); other pressed and blown glass and glassware (327212); glass containers (327213); and glass products not elsewhere classified (327215). Each has distinct HTS tariff lines and potentially different trade-remedy exposure.

Yes. Certain flat glass and glass container products have been subject to antidumping or countervailing duty investigations at various times. Importers should verify current order status with CBP and the International Trade Administration before sourcing, as coverage and scope vary by product specification and country of origin.