Rain Bird 12SA Series 13-ft-18-ft Half-circle Pop-up Rotor in the Underground Sprinklers department at Lowes.com
Amazon.com : Rain-bird 5000 Series Rotor Sprinkler Head - 5004 PC Model, Adjustable 40-360 Degree Part-Circle, 4 Inch Pop-Up Lawn Sprayer Irrigation System - 25 to 50 Feet Water Spray Distance (Y54007) (