Double walled inside, made of S.S. 304. Outside of Mild Steel Sheet powder coated. 50 mm mineral wool insulation on five sides. Temperature is controlled by a Hydraulic type thermostat from 5? above ambient to 100? ± 0.5C. Heating element are of copper Nickel plated tabular type. With perforated and removable diffuser shelves. Stainless Steel cover, cord with plug gable type cover. Work on 220/230 volts A.C. (But Without Rack And Thermometer). Size Inside Chamber : 300 x 175 x 175 mm ( suitable for 1 racks ) Capacity: 12L