Set up for 12"x16" rough opening. It is all aluminum vent and the operator and operator bracket is missing, and seal needs to be replaced. We have new operators, brackets and vent seals available on our parts e-store. Top has very few dents and dings and some minor oxidation. Hinge is bent on one end. Vent was cut out of trailer, and needs to have the rivets drilled out to re-install.