Rain Bird Professional Series 2" Half Circle Pop Up Spray Head with Dual Spray Nozzle. It features patented close-in watering for most efficient uniform water coverage, eliminating brown spots. The pressure-activated co-molded wiper seal, stainless steel reduction screw, removable grit filter, stainless steel retractable spring, and easy nozzle alignment ensure reliable operation. This sprinkler operates efficiently at low water pressure and has a 1/2" inlet.