The 6V dome is exactly half of a sphere. As the frequency goes up (2V, 3V, 4V, etc.), the 'roundness' of the dome increases, as does its overall strength. The frequency 6 (6V) dome is the strongest configuration that Sonostar makes, and this dome can easily be built up to 50 feet in diameter without any structural issues. There are nine different sized struts in Frequency 6 domes, and you can find those lengths using our Sonostar Dome Calculator. It can be assembled as a permanent structure using PVC glue/cement; or using the nuts and bolts, it can be disassembled and reassembled over and over.