D3659 Half Glass Steel Door Half Glass Door Type 2 Lock Type Cylindrical Material 16-Gauge Thermal Insulation U-Factor 0.41 Door Opening Height 84 in Door Opening Width 36 inThickness 1-3/4 in Agency Compliance UL 3/4 Hour Fire Rating Includes Doors Without Glass 4-7/8 in 37-1/8 in 69-3/8 in 42-3/4 in