Steel Security Door Door Type Prehung with Wire Glass Lock Type Cylindrical Frame Type 16-Gauge Stainless Steel Material 24-Gauge 304 Stainless Steel Hand Left Thermal Insulation U-Factor 0.41 Door Opening Height 85-7/16 in Door Opening Width 38-5/8 in Window Height 24 in Window Width 4 in Thickness 1-3/4 in Overall Depth 3-1/2 in Includes Steel Frame Nylon Lockset Insert Roller Bearing Fixed Pin Hinges and Adjustable Strike Plate