Four stackable trays create an easy-to-use sprouter for growing a wide variety of delicious, healthy sprouts. Made in the USA, this durable system is made by Victorio-- maker of quality products! The set includes four growing trays, one water collection tray, lid, instructions and alfalfa seeds. Sprouter can be expanded to 8 total trays (sold separately). Tray are 6 inches in diameter. Durable system that will provide your family with sprouts upon sprouts!