This item is an nVent HOFFMAN AVK66 Louver Plate Kit, Enclosure Accessory, 7.88x7.50 inch. It is known to be a working unit. It was purchased for use in a piece of test equipment. It may have never been used or it may have been installed & verified but then not needed for the application. If you receive this item and it does not work, seller must be notified within 7 days and item must be returned in 21 days for a full refund. Return shipping is paid for by the buyer. Ships within the continental United States only - No international buyers.