This multi-tray worm composter is a condo for red wigglers! They work to speed up the composting process as they add nutrient-rich castings to the mix. Fill each stacking tray with food scraps, junk mail and other household and garden waste. Worms start in the bottom tray and migrate upward as they break down waste into compost. Just pull your finished compost from the lower trays and you won't have to sort worms - they've already migrated for you. The Worm Factory makes it easy to add nutrient-rich fertilizer to plants and gardens. Additionally, nutrient-rich moisture is captured in the collection tray and can be drained as liquid fertilizer known as "worm tea". A complete instruction manual makes set up easy and tells you exactly how to manage an odorless bin year round, indoors and outdoors. It's made with recycled and food grade plastics and is manufactured in the U.S.A. Includes shredded paper and 1 coir brick. Choose either terra cotta (TC), green (7G), or black (8B). Dimensions: 16"L x 16"W x 21"H. Worms can be purchased at www.findworms.com.