Lifetime 60058 Compost Tumbler, Black, 80-Gallon High Density Polyethylene (HDPE) Plastic, Powder-Coated steel Tumbler capacity: 80 gallon, 10.72 cubic feet. Tumbler Design : Single Tumbler Double walled panels to absorb and retain the heat that decomposes the material Internal bar mixes the compost and allows the flow of oxygen Tumbler easy turns on its axis for balanced rotation