75mm Dome vent S/S


 Mushroom Dome Vent,  Stainless steel - Hole Size: 75mm; Flange Size: 115mm

The mushroom vent style, is primarily a vent to extract air out rather than air in.  The design allows air to flow over the top, creating a vacuum allowing the air to exit from the cabin ceiling.  The lid fits on a shaft that allows it to spin up or down to the point of locking air (& water) out.