- Quality constructed from high density polyethylene (HDPE).
- Contains UV inhibitors which help protect the material from deteriorating in the sunlight.
- Includes twist and lock extension tube that does not require screens.
- Comes with a builtin damper to prevent backdraft.
- Includes a built-in ¼ inch screen to prevent hood access by birds and many insects.
- Screen can be removed for use as a rooftop dryer vent (screen cannot be reinserted once removed).
- Available for 4 inch or 6 inch pipe sizes.
| Series | Polymer - With Screen, Damper And Removable Stem |
| Size | 4" |
| B | 3 |
| E | 2 1/2 |
| F | 12 3/4 |
| H | 4 3/4 |
| R | 1 |
| W | 11 |