Presenting the Thermo Scientific 3556-6X as one of the best flammable materials storage refrigerator freezer unit available with us. Featuring a temperature range of 1 to 12 C for refrigerator and -20 to -12 C for freezer section, this manual defrost unit provides 4.5 cu. ft. space for storage of volatiles where a spark-free internal cabinet environment is required. Three fixed shelves and three door shelves in refrigerator section gives you ample storage space. Engineered with no internal electrical components which could trigger an explosion, this manual defrost refrigerator freezer meets OSHA and National Fire Protection Association safety requirements. Key lock not included.