Self Watering Spikes Automatic Adjustable Drip Irrigation System Watering Devices for Plants Flower Auto Water Dripper Device Description: Type: Watering Spikes Material: PP Size:13.5*3cm Quantity: 5/10 pcs Product color: blue,green Features: [Adjustable valve] The flow rate can be controlled. The plant watering Device with control valve can control the dripping speed of 0-60s/drip, and the sustained drip lasts for 1-15 days. Only adjust the valve to Meet your needs without complicated setup steps. [Simple and Convenient] Installed without any tools, just drill some holes in the bottom of the bottle or cut the tail of the bottle to keep the air flowing. [Suitable bottles] Suitable for all bottles with an inner diameter of 1.1 inches / 2.8cm,suitable for most beverage bottles, not for mineral water and pure water bottles. (measure the inner diameter of the bottle before installation). [Multi-Scene Application] Vegetables, potted plants, houseplants, water plants day-to-day, patio plants, herbs, hanging baskets, desk pots, hanging plants, outdoor gardens, small tree, shrubs. Note: 1.Please allow 0-2 cm differs due to manual measurement. 2.Due to the different display and different light, the picture may not show the actual color of the item. 3.If you have other questions, please contact customer service in time.We will give you satisfactory service.