Heat Activated Fire, Water and Smoke Resistant Door Seal With 30 Minute Interior Heat Barrier Rated at 1400°. Based on Independent Lab and Material Rating. Deluxe LED Programmable E-Lock Panel Accepts 3-8 Digits With Silent Mode. Emergency Override Key To Protect Against E-Lock Failure. Fully Carpeted Interior Includes Adjustable Shelf. 2 Live Bolts and Fixed Pry-resistant Lip on Back of Door. Heavy Duty Steel Construction W/ Continuous Welds. Hing Design Allows Door To Be Opened Beyond 180° For Easy Access.