About this item 360 degree adjustable: 8 spray holes and can adjust the water flow, also to cut off the water flow. Large water passages and self-flushing action help avoid the clogging. Connection: 1/4 inch barbed thread fitting, 1/4'' pipe, suitable for 4mm/7mm tube (inner/outer diameter). 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 irrigation. Efficient use of water: Able to maintain constant during long periods of 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. Drippers may cause some odor in long-lasting packaging. Please open and put the air convection back on in 1-2 days. The smell will disappear normally.