White, Cyclone Sewer Plumbing Vent Cover, Use The Power Of The Wind To Draw Holding Tank Odors Out Of Your RV, Even A Gentle Breeze Impacts Its Dynamically Engineered Shape Creating A Powerful Vortex That Pulls Odors Up & Away, Attaches Easily To Any RV Plumbing Vent, Rotates 360 Degree To Follow The Wind, No Drilling Into Your Roof Top.