Adjustable automatic watering spike, plastic bottle indoor outdoor automatic garden plant drip irrigation system Plant watering automatic watering system : The plant watering spikes are made of ABS plastic material, durable and strong. Each spike has a shelf life of over one year and our spikes are more durable than other spikes. Adjustable switch: Adjustable to provide the right amount of water for the different needs of the plant, you can control the speed of the water flow, no need to worry about the water coming out too fast or the hole getting in the way. Easy to install: attaches to a full plastic water bottle. Next, punch a hole in the bottle section (to allow water to flow out) and place the plant drinker near the bottom of the plant. Fits most bottles: The watering bulb fits most branded bottles with a 1 .1 inch inner diameter capsule. Enjoy your occupation: enjoy spending time with your family and leave your plants to me. Watering plants are perfect for your vegetables, indoor and outdoor gardens, everyday aquatic plants, potted plants, houseplants, herbs, patio plants, hanging baskets, tabletop pots, hanging plants, small trees, shrubs. Length: approx. 13.5cm Colour:Blue,Green Package includes: 12 pieces of automatic watering spikes