This plastic square patio planter features a polyethylene plastic double wall construction for durability and a built in reservoir sub-irrigation system to encourage healthy plant growth. Long-lasting beauty, durability and quality. This plastic planters are made from high-grade polyethylene, double wall design. Available in black color. Approximately 9.5 gallon soil capacity, water capacity is approximately is 8.75-gallon. This product comes with 15-year limited warranty. Measures 20-inch length by 20-inch width.