Exaco AEROPLUS6000 Compost Bin The intelligent multiple chamber compost bin with adjustable ventilation for summer and winter Saves laborious shifting of compost, due to its 3-phase system the waste is mixed and aerated two times by gravity Walls include unique "active" aeration system-which provides controlled air flow for optimal microbial action Large filling and removal flaps with Snap-On wind protection Hinged lid with turning handle "lock" to keep animals out