Vetsupply: The CatMate litter double tray set and scoop are three hygiene products created exclusively for use with CatMate wood pellet litter and other varieties of wood pet litter. It\'s made of tough plastic with a smooth finish that\'s perfect for Catmate litter and makes cleaning up after your cat a breeze. This tray is also one-of-a-kind! When exposed to moisture, it degrades into a fine powder.