Cooper & Hunter Unassembled Metal Wall Sleeve and Exterior Grille for Packaged Terminal Air Conditioner. Designed especially for Cooper & Hunter PTAC but can be used with other Packaged Terminal Air Conditioners using standard 42"x16" size.
This wall sleeve is insulated for thermal efficiency and noise reduction. White powder coating matches PTAC units.
Due to the production process painting might have small imperfections or marks. How to Assemble Cooper&Hunter PTAC Sleeve - YouTube.