Aura Roof Vent - 2 Minute Install on a Flat PVC Roof.

A Complete installation in 2 minutes, from taking the large Aura Vent out of the box, placing it on the roof curb (built to specs available on the roofvents.com/ web site) and screwing it in. Everything fit perfectly, and just like that the vent (along with the hundred or so vents also installed today) is ready for years of trouble-free ventilation.
Active Ventilation Products: roofvents.com/
Aura Vent with Curb Mount Flange: roofvents.com/gravity-roof-ve...
AV-20-C12-CMF: roofvents.com/gravity-roof-ve...

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So do they spin?