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/-40T/-70"C is achieved by hermetically sealed compressor. The gap between the inner and outer wall is filled with Puff Insulation to avoid thermal loss. Body is mounted on a sturdy angle iron frame and is mounted on caster wheels. Unit 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 storing shelves.