Outpak washout’s 4’x4’x14″h corrugated construction washout is a single wall, 55c michelman coated, wet strength washout, making it light, yet durable. It folds flat for easy transportation and storage. Comes with a 6mm leak proof poly liner. Great for concrete, paint, drywall mud, stucco and mortar. Capacity: .68 cubic yards/140 gallons.includes polyethylene liner.