Dial in the right amount of spray to your plants with the Adjustable Flow Micro Sprinkler Assembly. Easy to install, the sprinkler comes preassembled on riser and stake which connects to 1/4 in. supply tubing. Twist the knob to increase or decrease the volume of water. The rotary spray emits water in a full-circle pattern at up to 23.9 GPH with an adjustable radius of up to 8.8 ft. (at 15-50 PSI). Ideal for watering groundcover, flower beds, planting beds, vegetable gardens, and new plantings. The Micro Sprinkler, also known as a Micro Sprayer, is made of polyethylene treated with UV inhibitors.