The Soil Machine PRO is a 7-cubic-foot compost tumbler. The 12" twist-off lid keeps your compost safely closed off, and the ends feature aeration vents. The Soil Machine's unique geometric shape helps in compost agitation, increasing composting effectiveness. The wheeled base and handles allow for effortless turning, and the tumbler can easily be separated from the base to roll freely from place to place. The base also collects and stores compost tea from the bin which can be used to help with fertilizing plant roots. The low profile ensures that it stays out of sight and won't be blown over in high winds. The Soil Machine PRO is made with recycled, BPA-free plastic. Just turn the compost tumbler once a week and see the compost in 2-6 weeks.