This Rain Bird 32SA rotor sprinkler features excellent durability and exceptional watering uniformity of patented Rain Curtain nozzle technology, resulting in a greener and more uniform lawn with reduced watering time. The rotor distributes larger water drops that cover evenly throughout the pattern, reducing excessive overspraying of wind. Nozzle micro ramps direct part of the spray near the head and add a gentle tight cover with reduced watering speed that wont wash out new seeds. Easy adjustment to the arch and the distance help you keep water on the grass, not spray on the house, walkway or driveway. The rotor also features a heavy-duty dual-action wiper seal that protects internal parts from debris and along with a heavy-duty stainless steel spring provides positive retraction for leak-free performance. It is installed on a standard 1/2 inch. Riser tube for easy replacement of older rotors