The Rain Bird 19-32 ft. Simple Adjust Closed-Case ½” Inlet Gear Drive Rotor Sprinkler is an intuitive short to mid-range 1/2 in. gear-drive rotor, offering value and convenience for residential applications. The protected closed-case design makes these sprinklers ideal for "creeping" grasses, sandy soil and other harsh surroundings. Water lubricated rotating stream operation is quiet and maintenance free. The many safeguards and trouble-free features built into our closed-case rotor sprinklers make them the perfect choice for any home landscape.