External plug 315 is used to block the ventilation duct in the ventilation system. It is most often installed at the ends of the air duct network and is designed to seal it tightly. The shaped product fits tightly to the duct to withstand a range of operating temperatures and pressures.
| Dimensions | Diameter (d) | Steel thickness (p) | Length (L) |
| 315 | 0.5 | 50 |
