| Color | : | Silver |
| Connection Type | : | Plain End |
| Diameter | : | 4 " |
| Domestic/Import | : | Domestic |
| Duct Size | : | 4 " |
| Finish | : | Reinforced Metallized Polyester |
| Flow Rate | : | 5,000 FPM |
| Length | : | 300 " |
| Material | : | Polyester/Steel (Inner Core), Fiberglass (Insulation), Metallized Polyester/Fiberglass (Jacket) |
| Pressure Rating | : | 6 in. wc. (Positive), 1 in. wc. (Negative) |
| R-Value | : | 8 |
| Series | : | #031 Series |
| Size | : | 4" Diam x 25' L |
| Temperature Rating | : | -20-140 °F (Continuous, Max Pressure) |
| Vapor Transmission | : | 0.05 perms |
| Velocity Rating | : | 5,000 FPM |
| Vent Duct Shape | : | Round |