The Hunter I-20 rotor that covers it all. The I-20 covers turf ranges from 17 feet to 47 feet. With over 20 different nozzle choices, the I-20 Ultra rotor can handle all the landscape needs. With Flo-Stop, there is no more running back and forth to turn off a system when doing maintenance on a single head in an effort to stay dry. With Flo-Stop, you can quickly turn off the flow of water to an individiual head while the rest of the system is in operation. Highly enigneered and tested to ensure proper performance. The arc is adjustable from 40-360 degrees. Comes with a built in check for elevation up to 10 feet. Flo-Stop allows stoppage of flow through an individual head while remainder of system is running.