Double Door Frames, Drywall After-Set Frames, Door Type 3, Frame Type Drywall Afterset, Material 16-gauge steel, Thermal Insulation U-Factor 0.41, Door Opening Height 80 In., Door Opening Width 60 In., Throat Opening Size 4-7/8 In., Overall Depth 5-7/8 In., Agency Compliance UL, 1 1/2 Hours Fire Rating, For Use With 3TGC6, 3TGC7, Includes Adjustable Compression Anchors, 7-3/8 In., 37-5/16 In., 67-1/4 In., 38-7/16 In.