Sentry F3300 Fire-Safe Waterproof File, Letter/Lgl, Steel, 18-1/2 by 21-1/4 by 15-1/8, Charcoal Waterproof seal file holder, 20 1/4" deep, protects important documents and keepsakes. One-hour UL fire protection for up to 1,700F external temperature: internal temperature will not exceed 350F. Key lock. 1.3 cu. ft. interior capacity. After-fire replacement warranty.