Steel Door with Frame Door Design Quick Mount Lock Type Push Bar Rim Exit Device With Locking Trim Frame Type 12 Gauge Steel Fully Welded Material 16 Gauge Steel Hand LHR Thermal Insulation U-Factor None Door Opening Height 80 in Door Opening Width 36 in Window Height 25 in Window Width 4 in Thickness 1-3/4 in Overall Depth 2-1/4 in Agency Compliance UL Listed 1.5 Hour Fire Rated For Use With Pre-Existing Door Openings