Amsec BF1512 Fire Rated Burglary SafeProduct Description "B" rated heavy duty construction. One hour fire label and (RSC) burglary label. Door: 3 1 2" thick, consisting of 1 2" solid plate steel with a unique proprietary fire and burglary resistant material. The dual seal deign utilized a silicone foam seal with a heat expanding intumescent seal. Body: 2 5 8" thick, consisting of 1 8" outer and inner steel plates creating a burglary resistant structure enclosing a unique proprietary fire