Features1Convenient: The automatic water dropper is suitable for all kinds of flowerpots, to adapt to the plant root water cycle, simple, easy and quick to provide water for plants. 2Adjustable Valve: With the help of adjustable valve, the flow rate can be controlled. The plant watering dropper with control valve can control the dripping speed of 0 to 60s/drip, and the sustained drip lasts for 1 to 15 days. 3Wide Application: The plant self watering device is suitable for most drink bottle, for standard drink bottle with 1.1in diameter bottleneck, but it can not installed on over 2.8cm diameter bottleneck. 4 Material: Made of plastic, the automatic water dropper is small in size, light in weight, and can be firmly inserted in the soil. 5Efficient: With the help of adjustable water dropper, there is no need for labor to irrigate, efficient and time saving, ideal tool for garden enthusiasts.SpecificationItem Type: Automatic Water DropperMaterial: PPWeight: Approx. 70g/2.47ozColor: As Shown Size: Inner Diameter: Approx. 3cm/1.18inOuter Diameter: Approx. 3.5cm/1.38inLength: Approx. 13.5cm/5.31inSpecification: A Pack of 10Package List1 Package x Automatic Water Dropper(10Pcs)