The Worm Factory 360 has a standard 4-Tray size which is expandable up to 8 trays, giving it the largest volume of any home composter. | The redesigned lid converts to a handy stand for trays while harvesting the compost. | Includes Manual and a Warranty included after product registration. | The accessory kit provides basic tools to make managing the Worm Factory 360 easier. | Built in "worm tea" collector tray and spigot for easy draining. | The Worm Factory 360 has a standard 4-Tray size which is expandable up to 8 trays, giving it the largest volume of any home composter. | The redesigned lid converts to a handy stand for trays while harvesting the compost.