Completely sealed with double gasketed glass for an air tight seal. Swing Stop retention cable keeps glass from abruptly swinging down. Captured thumb screws & closure mechanism for ease of use and excellent sealing. 95% reflective European aluminum interior offers excellent reflectivity and diffusion. 6” integrated air-cooled fittings with bead ring. Galvanized steel housing with major brand powder-coating. EZ Breeze aerodynamic junction box.