About this item 360 degree adjustable: 8 spray holes and can adjust water flow, also to cut off water flow. Large water passages and self-flushing action help prevent clogging. Connection: 1/4 inch barbed thread fitting, 1/4'' hose, suitable for 4mm/7mm (inner/outer diameter) tube. Be sure to put the connected part in 70~80 water for 10 seconds before assembling it. When cool, the tube will stay tight.: Widely Used: Ideal for watering potted plantsFor agriculture, lawn, garden drip sprinkler irrigation. Efficient water use: Able to maintain constant during long periods of egg laying or pressure fluctuations, the uniformity of irrigation, the slow watering rate allows the soil to absorb water more completely in the root zones of plants. Package included: about 200x Micro Drippers. The drippers may cause some odor in the long-lasting packaging. Please open and put back the air convection in 1-2 days. The smell will disappear normally.