Features: The flow is controllable, and the plant waterer with control valve can control the drip rate. Simple and convenient, without any tedious installation. Accurate amount of water, give different amounts of water to different plants and flowers, don't be a plant killer. After the installation is complete, if there is water overflowing from the bottle mouth, please remove the plastic ring that comes with the bottle mouth and tighten the bottle mouth before use. Specification: Material: PP Size: dripper: 7.17in/18.2cm, Dripper + bottle: 3.35*12.72in/8.5*32.3cm Color: random color Applicable: 28-30mm bottle neck pot, 3-7 days automatic watering Package Includes: 1pc Notes: Please allow minor errors due to manual measurement. The colors may be a little difference for the different monitor display.