Double walled with inner chamber made of S.S. and outer of thick PCRC sheet duly enamel painted. Temperature range from ambient to -20*C is achieved by hermetically sealed compressor. The gap between the inner and outer wall is filled with high grade mineral glass wool to avoid thermal loss. Body is mounted on a study angle is mounted on castor wheels. Units is fitted with solid state digital temperature indicator-cum-controller. Horizontal chest type models are supplied in a single compartment whereas vertical models are supplied with three stainless steel storing shelves.