D3667 Half Glass Steel Door Door Type 1 Lock Type Mortise Material 18-Gauge Thermal Insulation U-Factor 0.41 Door Opening Height 80 in Door Opening Width 36 in Window Height 25 in Window Width 23 in Thickness 1-3/4 in Agency Compliance UL Includes Glass Not Included 6-5/8 in 37-5/8 in 68-5/8 in 36-15/16 in 34-7/16 in