Making effective use of water: Able to maintain constant when Long laying or pressure fluctuations, irrigation uniformity, slow watering rate allows soil to absorb water more completely in the root zones of plants.Connection: 1/4-inch barb thread connection, 1/4'' hose, Suitable for 4mm/7mm(Inner/ Outer diameter) tube. Make sure you put the connected part into the 70~80water for 10seconds before assmbling. After it cools down the tube will stay tight.360 Degree Adjustable: 8 spray hole and can adjust water flow rate , also for cutting off the water flow.Large water passages and self-flushing action help prevent clogging.Package included: About 50 x Micro Drippers. Drippers may cause some plastic smell in the long time's package. Pls open and hand where the air convection in 1-2 days.The plastic smell it will go normally.Widely used: Great for watering potted plants,For agriculture, lawn, garden sprinkler irrigation drip.