95% reflective German aluminum interior offers excellent reflectivity and diffusion. Completely sealed - features double gasketed glass and hinged frame to hold glass tightly in place. Maximum air cooling with built-in 6" 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. Integrated socket & 15' lamp cord. Easy carry handles.