| 8421.39 | | Other: | | | | |
| 8421.39.40 | 00 | Catalytic converters | No. | Free | | 35% |
| 8421.39.80 | | Other | | Free | | 35% |
| 8421.39.80 | 05 | Dust collection and air purification equipment: | | | | |
| 8421.39.80 | 05 | For machine tools of headings 8456 through 8465, inclusive | X | | | |
| 8421.39.80 | 15 | Other | X | | | |
| 8421.39.80 | 20 | Other: | | | | |
| 8421.39.80 | 20 | Industrial gas cleaning equipment: | | | | |
| 8421.39.80 | 20 | Electrostatic precipitators | No. | | | |
| 8421.39.80 | 30 | Other | No. | | | |
| 8421.39.80 | 40 | Gas separation equipment | No. | | | |
| 8421.39.80 | 60 | Other: | | | | |
| 8421.39.80 | 60 | Pneumatic fluid power filters, rated at 550 kPa or greater | No. | | | |
| 8421.39.80 | 90 | Other | X | | | |
