Additional features: Odorless operation with Thermo Siphon Airflow design Recycles kitchen waste and junk mail into compost Use indoors during winter and outdoors in summer Improved lid and base design Holds up to 8 trays - largest worm composter of its kind 20-year warranty on parts and workmanship While it's similar in design to the popular Worm Factory® 4-Tray Composter (CAD002), The Worm Factory® 360 Worm Composter - Terra Cotta features a thicker, sturdier design with an improved base and lid. And the new Terra Cotta color looks great in any outdoor setting. This composter can hold up to 8 trays instead of 7, and it includes a handy compost accessory kit, featuring a coir brick, hand rake, scraper, and thermometer, which make maintaining your system cleaner and easier