From the manufacturer
About this item Brackets not included Self-watering balcony box with removable planter, water level indicator and plant substrate Lechuza planter and plant insert are varying height Drainage holes in the inner pot help moisture flow from a water tank into the substrate. Water level indicator indicates when enough water is present and when it needs to be added, Pour the first weeks from above until the roots enter the water reservoir. Material: polypropylene. Interchangeable plant insert From the manufacturer