Systems Trading Corporation ComboSpin 70cm Composter with Rolling Base: * Double wall construction insulates mixture for excellent heat retention and faster breakdown * Charcoal grey color creates more heat retention from sun * Compost needs air and CompoSpinâ¬"s special air tubes give constant supply * 21st Century sphere design makes composting process easy and fun as compost must be mixed * Base has 8 ball bearings to make spinning, mixing & tumbling easy * Roll CompoSpin anywhere in your yard to deliver fresh organic compost * Simple assembly takes just 30 minutes or less * 51 gallon capacity * Twist and lock lid make adding fresh material and removal of compost easy * Animals and pests cannot enter the CompoSpin * Made of 100 percent recycled plastics for environmental sensitivity * Diameter: 28" * Weight: 23 lbs * 1-year warranty against manufacturer defects