Rain Bird 1300 Full Circle Flower Bubbler Head 1300A-F Ideal for use with roses, threes, shrubs and small plants Stainless Steel adjustment screw regulates flow and radius for spacing between from 1 to 3 feet (0.3 m to 0.9 m) apart. Shipped with SR-050 1/2" (15/21) inlet filter screen for easy installation and resistance to debri. Fully adjustable flow. Non-corrosive plastic and stainless steel construction for long life.