Low pressure and friction loss. Meets SMACNA gauge requirements. Airtight 4-ply lock seam construction. Meets leakage Class 3 for 10” W.G. Duct construction class in a sample test section. Sealant is required only where elbows attach to the duct, saving labor time. Greater structural integrity. 26 ga Galvanized Steel
| Diameter | Box Qty |
| 4″ | 30 |
| 5″ | 17 |
| 6″ | 60 |
| 7″ | 40 |
| 8″ | 35 |
| 9″ | 24 |
| 10″ | 18 |
| 12″ | 10 |
| 14″ | 6 |
| 16″ | 1 |
| 18″ | 1 |
