., Agency Compliance UL, 1 1/2 Hours Fire Rating, For Use With 3TGC6, 3TGC7, Includes Adjustable Compression Anchors, 7-3/8 In.Double Door Frames, Drywall After-Set Frames, Door Type 3, Frame Type Drywall Afterset, Material 16-gauge steel, Thermal Insulation U-Factor 0., 67-1/4 In.