Three colors: orange, blue and green. It is made of preferred environmentally friendly PP plastic. It is 16.5cm long and 5.5cm wide. The plant self-watering system uses a plug-in interface design and has good permeability, ideal for short business trips or short vacations. Adjustable speed design: The plant watering device with a control valve can regulate the drip speed. Because different plants have different absorption rates, you can adjust the flow to 3 to 21 days or more, depending on the time needed, and you can prevent overwatering and make plants healthier, very good for scientific planting. Automatic watering: With water storage design, effectively prevents water from leaking from the bottle mouth, thickened design, sturdy support structure and prevents the self-watering equipment from running dry during use. The improved design of the plant watering devices can ensure that the water pressure is not affected by the lowered water level. Easy to Use: The plant watering system requires no annoying installation, just tighten the drip irrigation watering devices and then stick them into the ground, no spike needed and no danger. Our automatic watering system is ideal for watering indoor flowers, outdoor plants or your vegetables on vacation. Suitable for Most Bottles: The self-watering spike fits many sizes of bottles. You are no longer limited to 1.1 inch ID bottles. The new waterer is suitable for the bottle from 0.8 inch to 1.2 inch - The tilt bracket helps your self-watering system not to tip over even if the adjusted bottle is too big. Don't waste time searching for the right bottle.