Self-contained, raised bed, mobile growing unit. 24 inches x 20 inches (60.96cm x 50.80cm) surface area. Holds approximately 2 gallons of water. Features an aeration and watering system that prevents root rot and mold. The resin used in this product is food safe high density polyethylene. It is chemically inactive, BPA free, and phthalate free. The plastic is colorized with ultra violet additives (also chemically inert) to prevent long term degradation in direct sunlight. Mulch cover retains water and protects from drought. Contains: mulch cover, water fill tube, aeration screen, grow box, and casters.