360 degrees adjustable: 8 spray holes and can adjust the water flow, also to cut off the water flow. Large water passages and Self-rinsing action helps with cleaning prevent clogging. Connection: threaded connection fluted 1/4 inch, 1/4'' pipe, suitable for 4mm/7mm tube (inner/outer diameter). Be sure to put the connected part into the water outside. 70 ~ 80 &deg; for 10 seconds before assembling. Once cooled, the tube will stay tight. Widely used: Ideal for watering potted plantsFor agriculture, lawn, garden drip sprinkler irrigation. Efficient use of water: Able to maintain constant uniformity during long periods of laying or pressure fluctuations. During irrigation, the slow watering rate allows the soil to absorb water more completely in the root zones of the plants. Package Included: About 200x Micro Drippers. Drippers may cause some odor in long-lasting packaging. Please open and turn on the air convection again in 1-2 days. The smell will disappear normally. Specification: Connector size: 4 mm Spray radius: 0-0.5 m Flow rate: 0- 70L/H Working pressure: 2-4 KG Package content: 4200 irrigation drippers. Suitable for 4mm tube /7 mm (inner/outer diameter) How to use: Connect PE pipe: < p class="a-spacing-base">Use a hole punch to make a hole in the drip irrigation pipe. drip, then insert the adjustable dripper into the hole. Pay attention to use a punch smaller than 0.5 mm from the dripper to drill the holes. Connect tube 4/7: These irrigation drippers can also connect directly to 4/7 tubes. Note: The tube should completely cover the beard.