Hunter I-20 Ultra Rotors If you have ever desired the convenience of being able to use just one rotor to cover all your needs, here it is! Have a small area for which you do not want to create a separate spray zone? Is a portion of your landscape in sandy soil? Is the landscape a mix of shrub zones and expanses of grass? Does one part of the turf require a higher cut? With all the feature on today's I-20 (its ability to cover a radius range of 17-47 feet and over 20 different nozzle choices), the I-20 Ultra Rotor can handle the full range of irrigation needs.