Weight : 1.500Gram (approx). Size : 15 inches dia. Made From Crafted Aluminum & Glass. Finish as shown in pic. Superb Detail & Craftsmanship. Working Porthole Opens & Closes. Hidden holes for mounting (includes screws). 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.