Orbit Voyager II Pop-Up Gear Drive Sprinkler Head 55061 (Discontinued by Manufacturer) Ideal for medium to large lawn areas Spray adjusts from a 20 Ft. to a 40 Ft. radius in a part or full circle The #1 selling gear drive sprinkler with a quiet and smooth rotating spray Universal - Works with Industry Standard 24 Volt Sprinkler Systems 4 In. pop-up height