Dial in just the right amount of water to your plants with the Adjustable Flow Micro Sprinkler. Amount of water can be increased or decreased with a twist of the dial. Water is released in a fan spray in two 30 patterns (creating a bow-tie pattern) at up to 23.9 GPH and an adjustable radius of up to 4 ft. (at 15-50 PSI). Ideal for groundcover, flower beds, planting beds, vegetable gardens, and new plantings. The 10-32 threaded inlet screws onto a rigid riser-no tools necessary to install. The Micro Sprinkler, also known as a Micro Sprayer, is made of polyethylene treated with UV inhibitors.