This is a set of 12pcs automatic self-watering device. Precise control , adjust the of water flow more easily and effectively. We upgraded the , it is easier for you to change the of the waterer. Made of plastic and you can use it repeatedly because each irrigation drippers ensure . Features -Color:Assorted Color -Material: Plastic. -Size: About 15.50X4.00X2.00cm/6.09X1.57X0.79inch. - Made of plastic and you can use it repeatedly because each irrigation drippers ensure . - It can be reused over and over. Reduce waste and protect the environment. - The plant watering device is suitable for all most bottles. - Whether your plants are indoor or outdoor, at home or in the office, this self watering spikes system ensure your plants hydrated. - These plant watering devices are perfect for potted plants, houseplants, patio plants, hanging baskets, deck pots, hanging plants or any other plants. Package list: 36 x Automatic Self-watering Devices