This plant watering spike can control the water flow rate and the dripping speed with control valve. It can be adjusted to provide appropriate water volume according to different plant needs. Installed without any tools, just drill some holes in the bottom of the bottle or cut the tail of the bottle to keep the air flowing, the plant watering devices can be inserted into the soil without worrying about water pressure and water leakage. *Adjustable Valve: This plant watering spike with control valve can control the dripping speed of water and the sustained drip lasts for about 1-15 days. Only adjust the valve to meet your needs without complicated setup steps. *Durable Watering Spikes: Made of high-strength and tough PP plastic materials, featured with excellent heat and cold resistance, it can be reused. Each irrigation dripper has a long service life. *Easy To Use: Installed without any tools, just drill some holes in the bottom of the bottle or cut the tail of the bottle to keep the air flowing, the plant watering devices can be inserted into the soil without worrying about water pressure and water leakage *Wide Compatibility: It fits for Pepsi Bottle, Coca-cola Bottle, Lipton Bottle, Diet Coke Bottle Or Other 1.1-inch Inner Diameter Bottles. (Bottle is not included) *Keep Your Plant Healthy: By using the self-watering spikes you avoid under or over watering, keeping the plants healthy, you could control the flow according to your vacation and calculate the time of each drip, but you may need to take some patience to adjust the drip that you need. Brand: Fresh Fab Finds Color: Green Blue Material: PP Fit For: 1.1in Inner Diameter Bottle Cap Outer Diameter: 3cm/1.19in Inner Diameter: 2.7cm/1.1in 1Pc Item Size: 3x3x13cm/1.19x1.19x5.1in 1Pc Item Weight: 9g/0.02lbs Package Size: 23x21x6cm/9.05x8.26x2.36in Package Weight: 313g/0.69lbs 24x Plant Watering Spikes 24x Valves 2 x Pins 1x User Manual