20 Large Porthole Mirror, Antique Brass Finish, Nautical Wall Decor, Port Hole. This one has an antique finish that ensures its place in any nautical decor style. This porthole adds sophistication, style, and charm for those looking to enhance rooms with a nautical theme. This porthole has a sturdy, heavy and authentic appearance, yet is made of aluminum to lower the weight and to allow for easy mounting. It opens & closes and is fully functional. About the size of a large beach ball. Made From Crafted Aluminum & Glass. Beautiful Antique Brass Finish. Superb Detail & Craftsmanship. Working Porthole Opens & Closes. Hidden holes for mounting (includes screws).