| Naics index | Naics index description |
|---|---|
| 423510 | Wire screening merchant wholesalers |
| 423510 | Zinc and zinc alloy primary forms merchant wholesalers |
| 423520 | Bauxite merchant wholesalers |
| 423520 | Coal dust merchant wholesalers |
| 423520 | Coal merchant wholesalers |
| 423520 | Coke merchant wholesalers |
| 423520 | Concentrates, metallic, merchant wholesalers |
| 423520 | Fuel, coal and coke, merchant wholesalers |
| 423520 | Fuller's earth merchant wholesalers |
| 423520 | Magnesium ores merchant wholesalers |