Algreen Products 87303 Athena Self-Watering Planter, Large, 17.5" DIA x 28.5" H, Charcoalstone Authentic textured design adds a charming touch to your home and patio or deck Double-wall molded design constructed with commercial grade polyethylene Self-watering reservoir creates sub-irrigation water system that slowly feeds soil and promotes root growth Features an overflow drain and plug making watering simple 5-Year limited warranty