Thermo Scientific JFM21R-1B has a manual defrost and a non-sparking magnetic gasket. This Flammable Material Storage Refrigerator features steel-encased electrical components and a foamed-in-place urethane insulation that minimizes operating cost. It comes in a white acrylic, easy-to-clean, scratch-resistant exterior and a corrosion-resistant, easy-to-clean and spark-proof interior. This unit incorporates a quiet, hermetically sealed compressor and CFC-free refrigerants with a heavy-gauge steel cabinet construction. Its design is ideal for safe storage of volatile materials.