Noise Reduction Door Door Type 1 Lock Type Mortise Frame Type Masonry/Stud Frame Material 16-gauge Steel Hand LH Door Opening Height 84 in Door Opening Width 36 in Throat Opening Size 5-3/4 in Thickness 1-3/4 in Overall Depth 4-7/8 in Agency Compliance STC-46 Includes Door Frame Perimeter Door Bottom Sound Seals and Threshold