Louver Flange Kit, Material Aluminum, Rough Opening Height 24 in, Rough Opening Width 24 in, Overall Height 1 1/2 in, Compatible with Grainger Part Number 5NKH7, 5NKJ3, Includes Mounting Hardware, Overall Width 26 1/2 in, Overall Length 26 1/2 in. This item has been restricted from sale in the following state (s): []