Featuring two 50-gallon (6.7 cubic ft.) tumblers, the lifetime dual compost tumbler is the perfect addition to your backyard. The ingenious tumbler design is perfect for easy batch composting. Both tumblers turn for balanced rotation, and the internal aeration bar mixes compost and provides airflow. Constructed of high-density polyethylene (HDPE), the dual compost tumbler is durable, UV-protected, and has dark, double-wall panels to absorb and retain heat. For added convenience, it has an extra large removable lid and a spring-loaded pin that locks rotation during filling. Microorganisms break down moist, well-aerated organic materials resulting in a useful and inexpensive organic soil conditioner and fertilizer.