Model 3551-11 is one of the best flammable materials storage refrigerator freezer unit manufactured by Thermo Scientific. Featuring a temperature range of 1 to 12 C for refrigerator and -20 to -12 C for freezer section, this manual defrost unit provides 10 cu. ft. space for storage of volatiles where a spark-free internal cabinet environment is required. This 240 volt combination unit is engineered with no internal electrical components which could trigger an explosion. It has magnetic vinyl gaskets for positive door seal and CFC-free insulation and coolant. Designed to meet NFPA 45 and 99 along with OSHA article 1910.307, this Thermo Scientific combo carries a 13 months parts and labor warranty.