No flame, no redness, no harmful smell. Some products contain overtemperature protection for overall surface electrical insulation. Can heat solid and gas, meeting your different heating demands, reliable in use. Using ceramic constant temperature heating technology, continuous heat output, automatic constant temperature work. After electrification, the electric energy is converted into heat energy within 0.1s and transmitted to the surface of the aluminum shell within 30S. Continuously provide heat source with a life of more than 10,000 hours. Suitable for: Disinfection, Heater, Humidifier, Dry Cleaner. Specification: Mounting hole size:4mm Heat material: PTC Thermistor Heat methods: heat by air flow Lead wire: high temperature line The length of lead wires : 200mm The length of wires : 10mm Surface insulate: No Size Chart: 9cmx6cmx6cm/3.54inchx2.36inchx2.36inch 20cm/7.87inch Package Includes: 1 x Heater Note: Please allow slightly errors due to manual measurement and different monitors.