Features: Material:aluminium,Glass Weight : 900 Gram (approx) Size : 12 inches dia. (Inner diameter approx. 8.5 " dia.) Made From Crafted Aluminum Glass Finish as shown in pic Superb Detail Craftsmanship Working Porthole Opens Closes Hidden holes for mounting (includes screws) The thick, dimensional frame of this beautiful porthole is reminiscent of those found on boats and ships. 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