Cody Assembled Ductboard Start Collar With 1 in Outside Ring, 551 Series, 18 in Fitting, Steel, Finish: Galvanized, 30 ga Gauge, For Use With: R4.2 and R6 Ductboard
| Series | 551 Series |
| Duct Size | 18 in |
| Vent Duct Shape | Round |
| Gauge | 30 ga |
| Material | Steel |
| Finish | Galvanized |
- Constructed of ASTM A653 CS type B galvanized steel
- Factory assembled
- Knock-out holes for damper installation
