Features: 1. The water will be slowly emitted through the device within 15 days, automatically watering your plants. The drip speed is adjustable. 2. Use the flow control to ensure your plants are watered as needed. 3. Simply screw a spike onto a full bottle of water, then insert the pointed end directly into the soil near a potted plant's stem. 4. No need to worry about watering your plants when away on a short trip. This device attaches to any screw-top bottle and waters your plants automatically. 5. Combine water and plant food in a bottle, then use the water spike to deliver nourishing solution to your plants. Specifications: Material: PP Color: GREEN Size: 13.5 x 3 cm Note: The controller fits bottles with a diameter of 2.54 cm (1.1 in). Bottles with a diameter of 2.8 cm or larger are not compatible. Package Included: 12 pcs Flower Drip Spikes – GREEN