High Quality Material: The Ceramic Glow Plug Kit is made of ceramic, durable and sturdy for long-term use and can be used as a replacement part. Heat Resistance: The glow plug is made of quality silicone nitride ceramic, with excellent thermal shock resistance and high temperature resistance, durable in use. Fast Heating: Excellent thermal performance, fast heating, works with high heating speed and low temperature starting performance. Wide Compatibility: Compatible for Eberspacher D2 D4 D4S and other overhead parking heaters. Package Included: The kit Ceramic Glow Plug Kit for 12V 5kW Parking Heater, Including 1 Glow Plug, 2 Gaskets, 1 Filter, 1 Wrench.