these are sturdy double walled units with outer chamber made of M.S/S. steel-304 grade sheet duly powder coated Bi-colour with inner chamber are made of S.S sheet 304 grade. The gap between inner and outer chamber is filled with high grade glass wool to avoid thermal losses.Beaded heating aliments are placed in ribs, at bottom and sides.Inner chamber is provided with ribs for adjusting perforated shelves to convenient height. Temperature is controlled by imported hydraulic type capillary thermostat/Digital Temp. controller from 50 deg to 250 deg plus minus 1 deg. An-L shaped prismatic thermometer is fitted to the unit for reading the chamber temperature. ( Only Thermostatic controlled oven ) Air ventilators are also provided on the sides of the unit. To work on 220/230 volts A.C.