Active Ventilation Products Aura PVC Vent Cap Model AV-8-PVC is the perfect solution to exhaust and cap 8 in. The Aura PVC Vent Cap has a patented, engineered design that continually exhausts air with no moving parts. The vertical louvers in its inner cylinder keeps insects, birds and animals from entering the PVC pipe, allowing optimal air flow and no maintenance. Model AV-8-PVC has a mill finish that will continually have a long lasting clean appearance. Made of durable and rust free aluminum, the Aura PVC Vent Cap s round aerodynamic design can with stand harsh weather and wind forces of up to 200 MPH.