Metal ceramic heater:Low watt densities of 18 watts per square inch (2.8 w/cm2) extend service life ... stainless steel. • Titanium.OUTSTANDING PERFORMANCE: Low watt densities of 18 watts per square inch (2.8 w/cm2) extend service life ... .S. and Canadian safety requirements, and CE.SIZES: 1,500 watts to 18,000 watts.VOLTAGES: 120-600 volts. Three phase standard, single ...