This clear 10 inch disc works with the Smart Cup / Crock series and the Smart Millet Tray (cups and trays are not included) . Provides a generous shield that prevents seeds, hulls, and other debris from falling outside of the cage. Transparent: Deflects debris back into the cage without obstructing your view or your pet's. Also protects the floor and walls from feeding messy fruit or nectar-eating birds. Includes the hardware to easily and securely fasten it to most cages. Dishwasher safe (top rack only).