Triple walled, inner made of thick stainless steel 304, outer made of M. Steel duly powdercoated.Insulation between inner and outer wall is done with is done with 75 mm thick glass wool toprevent any heat loss.Provided with double walled door.Door is provided with best quality handle, gasket etc.Inner chamber is provided wire mase stainless steel tray.Temp range is from ambient to 250 ºC and is controlled by digital microprocessor-basedtemperature controller with an accuracy of ±2 ºC.Heating is done with heating elements SS tubular air heater.One motor blower on back side for air circulation.