"GenieDome gives cats who crave total privacy their wish. The snowy white Dome tops the pearl gray rim that securely nests on to the CatGenie Base. The GenieDome is made of four removable sections which allows you more options to satisfy your cats' needs. The top of the Dome is 19.5"" from the floor. With its Dome, the CatGenie is not as tall as the back of the unit. The GenieDome comes with Genie SideWalls so there is no need to order the SideWalls separately. For use with the CatGenie Litter Box, sold separately."