The new Irritrol 550R rotor delivers basic simplicity and dependable action all in one rotor. With its proven 3/4" gear-driven design, 50 of watering radius and a full 5" pop-up, this rotor just gets more done. Installation is made simple with Irritrols familiar top arc adjustment and all-in-one full- and part-circle operation from 40 to 360 degrees. And, with the ability to quick check the arc with positive left and right stops, set-up time is further reduced. The 550R comes with a wide selection of nozzles (8 standard and 4 low angle nozzles) making it the ideal rotor for your everyday installation.