D3713 Half Glass Hollow Steel Door Door Type 2 Lock Type Mortise Material 16-Gauge Thermal Insulation U-Factor 0.41 Door Opening Height 84 in Door Opening Width 36 in Window Height 29 in Window Width 23 in Thickness 1-3/4 in Agency Compliance ANSI A250.8-1998 UL For Use With Frames 1PHU8 1PHV3 1PHV7 1PHW2 Includes 1/4 in Clear Wire Glass with Safety Film Fire Rated For 45 Minutes 4-7/8 in 37-1/8 in 69-3/8 in 40-1/4 in 84 in