Section 15 BASE METALS AND ARTICLES OF BASE METAL 79 ZINC AND ARTICLES THEREOF 79 03 ZINC DUST, POWDERS AND FLAKES. 79 03 90 ZINC POWDERS AND FLAKES 79 03 90 00 ZINC POWDERS AND FLAKES Commodity Code Description 79 03 90 00 000 ZINC POWDERS AND FLAKES