The Stopgull Boat Vent 3 is a perfect way to mount your Stopgull to the top of your boat cover. Like the original Boat Vent 3, this vent installs directly into your cover allowing for ventilation and tenting. After you install the cover, simply use the twist lock mount located on top of the vent to install the StopGull.
Diameter: 4.5"
Height: 2"
Sold each.