We make building a Geodesic Dome Greenhouse easy. We offer simple Greenhouse Dome Kits in a wide variety of dome diameter sizes, and different sizes of PVC. The frequency relates to the strength of the dome. The higher the frequency (2V 4V etc) the stronger the geodesic greenhouse will be. Our PVC is furniture grade and coated with UV protective coating. It's easier to grow your own food than you think, live off the land, and live simply. Limit food waste and take care of the Earth.