D3683 Vision Light Steel Door with Glass Door Type 1 Lock Type Mortise Material 18-Gauge Thermal Insulation U-Factor 0.41 Door Opening Height 80 In. Door Opening Width 32 In. Window Height 11 In. Window Width 11 In. Thickness 1-3/4 In. Agency Compliance UL 1 1/2 Hour Fire Rating 6-5/8 In. 37-5/8 In. 68-5/8 In. 34-7/16 In.