Commercial Water boilers for Restaurant, Hotel, Catering, Offices, etc stainless steel is the most common steel. The steel contains both chromium and nickel metals as the main non-iron constituents. It is an austenitic stainless steel. It is less electrically and thermallye conductive than carbon steel and is essentially non-magnetic. High quality & low maintenance - 304 grade "18/10" mirror polished stainless body with vented lid. Concealed heating element-quick heating, superior corrosion resistance for effortless cleaning, the element is replaceable on the 10, 20,30,40litre models. Temperature control-thermostat has variable. settings, for greater temperature control. Safety - over temperature protection device turns off the power if the urn boils dry. Standard inclusions- Dual indicator lights, on/off switch, heat-resistant knobs, easy-lift safety handles with a notch for Enhanced Safety chrome plated brass non-drip tap,