D4284 Steel Door With Louvers Door Type 2 Lock Type Mortise Material 18-gauge Thermal Insulation U-Factor 0.41 Door Opening Height 84 in Door Opening Width 48 in Thickness 1-3/4 in Agency Compliance ANSI UL For Use With Frames 3TFY2 3TFY4 3TFY6 3TFY8 Includes 24 X 60 in Louvers 4-7/8 in 37-1/8 in 69-3/8 in 40-1/4 in 84 in