The Aero plus 6000 is the latest in vertical composting. Designed to take up much less space than 2 or 3 regular compost bins. Made from 5mm thick plastic, these are much more durable than other 3-stage units. This item is ideal for organic household waste and kitchen scraps (not for grass cuttings in large quantity.) The clever multi-chamber system saves you from turning over the compost and features large filling and removal flaps with Snap-On wind protection. This compost bin has adjustable ventilation for air control in summer and winter. The Aero plus 6000 features composting in 3 stages. In the 1st stage, food and garden waste is collected and mixed with only low ventilation (anaerobic). This has proved to prevent from annoying insects like wasps and flies and to bring a greater mass of waste at one time to the 2nd stage by opening the discharge flap. In the 2nd stage it is digested rapidly with generous ventilation, generating heat up to 70 degrees c (158 f), thereby destroying weeds. Here, the waste looses a lot of volume, so the 2nd stage has a capacity of approximately 3x that of the first cabin. When the 2nd stage is filled, it is very comfortably moved to the 3rd stage, at the same time mixed and aerated by the turning the outside handle which turns the shelf. In the 3rd stage, the digested and cooled down compost is maturing in intense contact with earth and the myriads of useful organisms therein. As new waste is separated from mature compost by the 3-stage system and due to the turning bottom, the mature compost is not compressed – removal is clean & easy through the two large discharge flaps/doors on opposite sides at the bottom camber of the composter. The Aero plus 6000 is the winner of the red dot design award and best of the best in 2013. 2 year warranty. Measures 31.1 X 31.1 X 43.3 Inches. Made by Juwel in Austria.