This product is a useful watering device that can automatically help us water the plants, saving us worry and effort. This is the perfect choice for watering any indoor plant. It is perfect for those who travel and want to make sure their plants are properly watered. It is made of materials and can serve us for a long time. Features - Material: PP. - Size: About 19.50X5.00X4.00cm/7.66X1.97X1.57inch. - Range of application: plastic bottles with mouth diameter of 28-30mm. - plant watering device is made of quality PP, durable and strong. - Great for flower beds, vegetable gardens, greenhouses, lawns and other. - Automatic plant watering spikes is a helpful assistant for the gardening, useful and practical. - It is perfect for those who travel and want to make sure their plants are properly watered. - This plant watering spikes has an ingenious design, easy to use, and saves labor. Package list: 6 Self Watering Devices