Double-walled fabrication, outer made of heavy-duty mild steel and inner made of heavy stainless steel. Exterior Finished in stoving enamel paint or powder coated paint. Temperature range ambient to 130ºC ± 2ºC controlled by a hydraulic thermostat or digital temperature controller. Capable withstand vacuum to 760mm Hg. workable on 220V AC. see through the end glass window provided. Vacuum gauge also provided along with a shelf.