Adjustable Valve with Adjustable Valve, The Flow Rate of Plant Watering Device Is Adjustable According to Different Kind of Plants. You Can Set Traffic Depending On The Time You Need , No Any Troublesome Setup. . Suitable For All Bottles Newly Upgraded Self-Watering Spike Is Suitable For Bottles of Any Size. Don'T Waste Time On Finding The Right Bottle. Any Bottle Makes The Self-Watering System Work. . Easy to Use without Any Tedious Installation, All You Need to Do Is to Cut A Hole In The Bottom of The Bottle and Tighten The Drip Irrigation Watering Devices. Then Insert It Into The Soil, No Need Any Other tools. . Good Material This Plant Watering System Is Made of Abs. Each Water Spike Has A Working Life of More Than One Year. Recycle Plastic Bottles Effectively. Reduce Waste and Protect The Environment. Give Your The Best Care of Your Plants. . For Almost Plantsthis Self-Watering System offers Adequate Moisture For Plant, Whether Indoor or Outdoor Plants In Gardens, At Homes or offices. It Can Be Used In Potted Plants, Indoor Plants, Flower, Vegetables, Terrace Plants, Hanging Basket, Deck Pots, Hanging Plants, Etc. You Can Enjoy Your Vacation Carefree. .