SentrySafe 2557CN - 19.6 CU Ft. 1 Hour Rated FireGuard Record Safe. Sleep well at night knowing that your confidential documents are protected from fire and prying eyes. The SentrySafe Insulated Record Safe – 2557CN carries the UL 350 - 1 Hr Fire and Impact Resistant Classification. At 19.6 cu. ft., it is ideal for convenience stores, banks, government agencies, restaurants, hotels and other commercial enterprises that realize the importance of securing and protecting vital business information and records.