Lechuza Delta Premium 15 - All-In-One, Charcoal The DELTA 15 is the perfect planter for smaller spaces Made in Germany of lightweight and UV resistant PP plastic for indoor use Simple yet elegant design complements any decor Self-Watering System features inorganic granulate compounds that provide the right amount of water to plant roots A water-level indicator lets you know when it is time to refill the reservoir Simple yet elegant design complements any decor