The Raindrip Half-Circle Drip Irrigation Micro Spray 5-Pack is ideal for any home garden. It's equipped with an adjustable flow knob which allows you to control the water output up to 23.9 GPH with a radius of 3.7 feet. The micro sprayer is made of high-quality polyethylene with UV inhibitors for long-lasting performance. Easily install this sprinkler without tools onto any 10-32 threaded rigid riser. Get the right amount of water your plants need with the adjustable flow micro sprinkler!