New 2015.
This remarkable devise prolongs the life of your boats upholstery by venting the enclosed space of the warm, moist air. Boat Vent 3 helps prevents mold, mildew, and bacteria from growing under your cover, and causing irreversible damage to your boat's interior. 
Boat Vent 3 features:
- Overhanging top to allow in less moisture
- 30 teeth on the washer for good grip
- Ergonomic reversible nut for easy installation.

The StopGull Air (P/N 303001) clips onto the top of this unit.