Joraform Compost Tumbler JK 125 The Composter is constructed for ease and simplicity of rotation - it's simply turned by hand whenever waste is put in. The insulation in the JK Composters allow the temperatures to rise higher than 160oF, resulting in quick and efficient composting The Composter are divided into two chambers. While one is being filled, the compost in the other chamber matures. The Composter are positioned off the ground so that there is no possibility of rodents or other pests gaining access to the waste in the machine.