Steel Door Flush Door Type 2 Lock Type Mortise Material 18 Gauge Steel Hand Non Handed Thermal Insulation U-Factor 0.16 Door Opening Height 80 in Door Opening Width 36 in Thickness 1-3/4 in Agency Compliance UL Fire Rating For Use With Curries Frames 35YV72 35YV73 35YV76 35YV77 Includes Polystyrene Core Closer Reinforcement Channel 16 ga. Top and Bottom Channel