| 331420 |
Copper alloys (e.g., brass, bronze) made from purchased metal or scrap |
| 331420 |
Copper and copper-based shapes (e.g., cake, ingot, slag, wire bar) made from purchased metal or scrap |
| 331420 |
Copper foil made from purchased metal or scrap |
| 331420 |
Copper powder, flakes, and paste made from purchased copper |
| 331420 |
Copper products made by drawing purchased copper |
| 331420 |
Copper products made by rolling, drawing, or extruding purchased copper |
| 331420 |
Copper products made in integrated secondary smelting and extruding mills |
| 331420 |
Copper products made in integrated secondary smelting mills and drawing plants |
| 331420 |
Copper secondary smelting and alloying |
| 331420 |
Copper secondary smelting and refining from purchased metal or scrap |