Double-walled construction Inner chamber made of Stainless Steel (SS-304 grade  Outer chamber is made of Stainless Steel 304  Fitted with heavy hinges with a ball catcher, spring-loaded door closing device. The door is duly insulated Adjustable two ventilation slides control inner air/vapor circulation  Inner chamber has ribs for placing the shelves at convenient levels Air circulation fan fitted at the rear wall of the chamber to maintain temperature uniformity in the chamber The inner chamber is properly insulated with the Special Grade Glass wool to prevent thermal losses Main Panel consists of Switches for Mains and Heater, Temperature Controller To work on 220/230V AC supply.