AeroQuick Compost Bins are built to last with proven durability and heavy-duty construction. These bins have been tested for 15 years at a facility in Southern Italy with a climate similar to Las Vegas, Nevada USA. Here are some features and specifications of the AeroQuick Composter: Features: Material is 5mm thick and much stronger than other compost bin designs Polyamide (nylon) corner clips are strong and easy to remove Unique wall panel design allows continuous air flow along all 4 side panels Comes in three sizes: 77, 110, and 187 gallons Rodent-resistant base available as an option for 77 and 110-gallon units and included with the 187-gallon unit Hinged lid with a sliding lock that keeps possums and raccoons out Two side doors for easy access to mature compost Specifications: AeroQuick Small 77 Gallon Assembled: 28.4" x 28.4" x 31.5"h -- 21.9lbs Box: 32" x 26.8" x 6.7" -- 24.2lbs AeroQuick Medium 110 Gallon Assembled: 31.5" x 31.5" x 42"h --30lbs Box: 42.1" x 29.6" x 5.9" -- 33lbs AeroQuick Large 187 Gallon Assembled: 37" x 37.1" x 43"h -- 49lbs Box: 42.9" x 15.9" x 11.8" -- 52lbs All AeroQuick Compost Bins are made from high-grade polypropylene copolymer resin with up to 40% recycled material. The resin is UV stabilized to prevent color fading.