| ID | 4 | 1. Constructed from 100% aluminized steel 2..Spiral louver design accelerates gas flow 3. Long lasting core 4. Strict quality control during the process 5. Design and logo are welcome 6. Two year warranty 7. Competitive price and good after-sale serive 8. OEM / ODM accepted |
| OD | 4 | |
| BL | 24 | |
| OL | 30 | |
| BH | 6 | |
| BW | 6 |
