Steel Door Flush Door Type 3 Lock Type Cylindrical Material 18 Gauge Steel Hand Non Handed Thermal Insulation U-Factor 0.16 Door Opening Height 84 in Door Opening Width 36 in Thickness 1-3/4 in Agency Compliance UL Fire Rating For Use With Frames 1PHT1 1PHT5 1PHT9 1PHU4 Includes Polystyrene Core Closer Reinforcement Channel