... gases, liquids, solids --- High mechanical strength heating elements for high intensity, high-density silicon ammoniation of composite materials made ... to user needs) Rated Power: 10W, 20W, 50W, 160W, 400W (can be customized according to user needs) Temperature stability: more ... other material made of carbon steel materials. 120V/220V 400W silicon nitride hot surface igniter for gas oven igniting