[Water flow controllable] New upgraded valve water flow control is more precise. It can control the dropping speed of 0-60s / drop, and continuously release the dropping for 1-15 days, no any troublesome setup [Suitable for all bottle] New upgraded mouth design make self-watering spike can be used with bottles of any size. Don't need waste time finding the right size bottle [Easy to use] Without any tedious installation, just need drill some holes at bottom of bottle or cut it, then adjust the valve to adjust the flow rate. This self watering spike system ensures that your plants stay hydrated [Not easy to tilt] The new anti-tilt bracket makes your automatic watering system even more stable, and it doesn't tilt when the fitted bottle is too large, saving you time and effort [Applicable] The plant watering device is made of PP plastic, environmentally friendly, very suitable for potted plants, indoor plants, terrace plants, hanging basket, deck pots, hanging plants, etc Package Includes:18 X Plants Watering spike 18 X Adjustable Slow Release Valve 18 X Anti-tilt bracket 1 X Pin with handle