Double walled chamber, Inner made of stainless steel and outer made of cold rolled mild steel sheets finished with powder coating. Inter space between the walls is highly insulated with special grade glass wool. Inner chamber accommodates easily removable stainless steel shelves. Full view inner GlassAcrylic door permits inspection of the items. Lock & Key arrangement is provided in the outer double walled door. Temperature controlled by digital temperature controller working in conjuction of with RTD sensor kept in the Hot Zone.