Jora 106 Gallon JK 400 Compost Tumbler This tumbling composter is constructed for ease and simplicity of rotation - it's simply turned by hand whenever waste is put in. The stable, food grade non-toxic insulation in the JK125 Compost Tumbler allows the temperatures to rise up to higher than 160 degrees F, resulting in quick and efficient composting. The Jora Compost Tumbler is divided into two chambers. While one is being filled, the compost in the other chamber matures. The JK400 has a volume of up to 106 gallons and capacity of 13-21 gallons a week. Side vents allow a flow of oxygen into the compost bin which, along with kitchen waste (green) and a carbon source (browns), will result in a successful compost.