95% reflective German aluminum interior offers excellent reflectivity and diffusion. Completely sealed—features double gasketed glass (between glass & reflector and glass & frame) and hinged frame to hold glass tightly in place. Maximum air cooling with built-in fittings and EZ Breeze® aerodynamic junction box. Bead ring to hold ducting firmly in place. Swing Stop® retention cable keeps glass from abruptly swinging down. Captured thumb screws & closure mechanism for ease of use and excellent sealing. The exterior is a powder-coated galvanized steel body. Comes with built in level for easy, consistent, level hanging. Integrated socket and new detachable 15 ft lamp cord. Easy carry handles.