D4283 Steel Door With Louvers Door Type 1 Lock Type Mortise Material 18-gauge Thermal Insulation U-Factor 3/8 in Door Opening Height 80 in Door Opening Width 48 in Thickness 1-3/4 in Agency Compliance ANSI UL For Use With Frames 3TFX2 3TFX3 3TFX6 3TFX7 Includes 24 X 60 in Louvers 6-5/8 in 37-5/8 in 68-5/8 in 34-7/16 in 80 in