The water pressure is critical.Package Including: 36pcs Drip Irrigation Drippers for 1/4" Drip Irrigation Tubing, 10 black plugs.Featuring Adjustable 360 Degree Water Flow Drippers on 5.8" Arrow Stake. For Garden Irrigation with 1/4 inch tubing watering system. Maximum Recommended Operating Pressure:15-40 PSI,Maximum water flow rate:31GPH. Made of quality plastic.Double-ended design. Water pipes can be connected to both sides of the dripper .easily solve the problem of garden irrigation and water shortage at the end of irrigation.The drip irrigation heads are removable and easy to clean without worrying about clogging.works well and actually much faster to install than the other common style Adjustable Design:The adjustable 360-degree water flow drippers offer versatility in watering. You can easily adjust the water flow mode and sprinkling distance by rotating the cap. can even be rotated to close.10 black plugs have been specially added.help to increases the water pressure Prevent water leakage.easy to clean and install.much flexible, you can place the product anywhere you need Widely Used: Suitable for various settings, including grow bags, pot and container irrigation in greenhouses, as well as watering trees, shrubs, nurseries, and garden pots. Enjoy efficient and reliable watering with our top-quality drip emitters The water pressure is critical.After Sale Service:if you have any questions please feel free to contact us! Package Including: 36pcs Drip Irrigation Emitters for 1/4" Drip Irrigation Tubing, featuring Adjustable 360 Degree Water Flow Drippers on 5.85" Arrow Stake. For Garden Irrigation with (4-7mm) Watering System. Products are available in spray diameters from 0 to 10 feet.