This Avantco 17819989 black back grille is a direct replacement for the one that came with your Avantco worktop or undercounter unit. This grille protects the refrigeration system components from damage while allowing proper airflow. Use it to replace a worn or broken part to keep your unit operating efficiently. It's compatible with Avantco ZWT-48 and ZUC-48 series worktop and undercounter refrigerators and freezers.