Descriptions: - This product is mainly made of silicon nitride ceramic substrate, with tungsten filament as the heat source, tungsten wire embedded in silicon nitride matrix, via hot-press sintering process to form an organic whole, then through grinding, welding wire, thus made the ignition components.- Suitable for parking heater. In cold areas for car-assisted heating ignition of the heating element, the spark sensor, and use silicon nitride heating element, you can quickly make the fuel gasification, ignition, combustion. The temperature in the vehicle quickly rises, even after the engine started before long or idling stopped.  Features: - Material: Silicon Nitride Ceramics- For Eberspacher Airtronic D2, D4, D4S 12V- Compact, light weight, energy saving, long life- Rapid heating, high temperature- High watt density, excellent thermal efficiency- Excellent chemical resistance- No electrical noise- Physical manufacturing, safety and environmental protection, no radiation on the human body  Packaged included: 1x 12V Car Spark Plug Ignition Wire Cable