Hades Hinged Double doorsHeavy duty 14 gauge steel Filled up with polyurethane for energy saving Double pane E glass, tempered and sealed to avoid conditioning leaks Included weather stripping to reduce air infiltration Thresholds made to prevent water infiltration Barrel hinges which are perfect for heavy use and can be greased for a better use Double doors include a pre insulated flush bolt system to lock the dormant door or unlock it for a complete opening space.