VELUX IPL M08 0073G Laminated Inner Toughened Outer Pane  78cm x 140cm --73 pane Laminated inner pane and clear and clean coating. An improved version of our standard pane, this glazing option comes with a laminated inner pane for safety which VELUX recommend whenever windows are placed above head height. The outer pane is toughened and includes clear and clean coating which helps the window stay cleaner for longer. Pane centre value (Ug) 1.1 W/m2K Sound insulation 35dB (complete window) Solar energy transmittance (g) 0.56 Light transmittance („v) 0.77