Amazon.com : Melnor Impact Sprinker; Pulsating Action; Metal Head with 3-Pronged Step-Spike; Waters up to 106' Diamter : Lawn And Garden Sprinklers : Patio, Lawn & Garden
Melnor Part # 9570 - Melnor Plastic Pulsating Sprinkler - Lawn Sprinklers - Home Depot Pro
Melnor Pulsator Sprinkler with Zinc 2-Way Spikes (2-Pack) 308-593 - The Home Depot