Algreen Greenwall Vertical Planting System with Pro Grade Grow Medium Innovative and Extremely Durable water tight construction with 4 large planting shelves and Professional grade Hydroponic Grow Medium Watering the Top Allows Water to Filter Down to Each Plant Shelf Excess Water Reserviour and Drain to Prevent Over-Watering Hardware Included for Simple/ Easy and Quick Mounting Innovative and extremely durable water tight construction with 4 large planting shelves and professional grade hydroponic grow medium Watering the top allows water to filter down to each plant shelf Excess water reserviour and drain to prevent over-watering Hardware included for simple/easy and quick mounting