Plant Self Watering System Is Made of Abs Plastic,Which Is Durable and You Can Reuse It Many Times,You Can Recycle Plastic Bottles Effectively and Reduce Waste and Protect The Environment. . Easy to Use:Just Tighten The Drip Irrigation Watering Devices, and Then Insert It Into The Soil, No Need Nail and No Danger. . Water Volume Control - This Is The Newest Automatic Watering System for Potted Plants, Design with Adjustable Drip Irrigation Valve, Can Control The Flowing Rate and Avoid Over-Watering, Provide Different Amounts of Water for Different Plants and Flowers. . The Newest Plant Waterer Adopt Constant Pressure Design, The Water Flow Is More Stable. Dust-Proof Closed Connect Mouth Design to Prevent Dust and Insects From Falling to Make Them Blockage. . Whether Indoor/Outdoor Plant or Garden, Home or office, This Self Watering Spikes System Ensure Your Plants Hydrated. .