Aluminum Louver vent 9″ w x 9″ h overall dimension Cut-out required 7.25″ w x 7.25″ h, Back side requires a min. of 3/4″ clearance to allow pivot arms to clear. Included back screen, fastens to backside of door plate. Back screen can be either fastened by welded or riveted to customer door plate. Keeps animals from extending paw out through louver. Fasteners not included.