Exhaust duct cap (to cap roof penetration for commercial exhaust fan

New Galvanized duct cap to properly cap restaurant rooftop exhaust ducts after removing the exhaust fan. Can be used to permanently seal the opening. Just slap it on, screw it to the sides of the roof curb or protruding duct, and its good to go (Some sealing caulk would be advisable). Has cross creases across the top to shed rainwater. New, never been used. $75.00 The picture is an example as to how it is used. It looks like the cap in the foreground.