General description This Bottle Irrigation Kit with Tap Adjusted Flow is designed to transform most plastic bottles into efficient watering reservoirs, making it ideal for keeping your plants hydrated while you're away. The kit is gravity-fed, allowing water to flow out of the base through a convenient tap system. Simply unscrew the tap to adjust the flow rate, and let air in through a hole punched in the top of the bottle. This ensures your plants receive the right amount of water automatically. Technical specifications Pack includes 16 irrigation spikes Cap diameter: 28mm Compatible with bottles that have a neck diameter of 25mm Compatibility and accessories Fits bottles with a neck diameter of 25mm Not compatible with smaller 50cl bottles that typically have wider necks Works best with larger bottles that have smaller necks Usage Easy to use with full instructions included Simply attach to compatible bottles to create a watering system