Amazon.com : Rain Bird 1800 Series Pop-Up Sprinklers 10 PACK - Nozzles NOT included - RainBird 4" 1804 model pop up irrigation sprinkler for lawn, yard, garden, planter beds : Patio, Lawn & Garden
Amazon.com : Rainbird 1800 Series Pop-Up Spray Head with Seal-A-Matic Without Nozzle, 6" : Patio, Lawn & Garden
Rain Bird Gear drive rotor Underground Sprinklers at Lowes.com