Are you worried about your plants suffering from under-watering when you're away on vacation? Keep your garden thriving with these Plant Self-Watering Spikes. Simply attach a water-filled bottle to the spike and adjust the water pressure according to your plants' needs. These spikes will ensure your plants stay hydrated for days, even in your absence, preserving the beauty and health of your garden. Why You'll Love It Adjustable pressure: These spikes feature adjustable water pressure. By rotating the valve, you can set the water flow from 0-60 drops per second. Compatibility: These self-watering spikes can be installed in plastic or glass bottles with a mouth diameter of 1.1cm. Wide applications: These self-watering spikes are perfect for indoor and outdoor plants. Feel free to use these spikes for potted plants, hanging baskets, hanging plants, deck pots, household plants, etc. Simple installation: It’s simple to set up these spikes. Simply fill a bottle with water and screw it on it. Now, put the valve in it and adjust the water pressure and insert it in the soil. *Note: Spikes will be random green or blue color. Features Keep your plants green & healthy No plant worry while outing Adjustable speed: 0-60/drip Compatible for 1.1 inches mouth bottle Simple to install Great for indoor & outdoor use Wide applications Package includes: 12/24 pieces