NGK CZ106 / 9883 Ceramic Glow Plug Genuine NGK Component (9883 ) As opposed to a metal rod glow plug, the heating coil of a ceramic glow plug has an especially high melting point. It is also sheathed in silicon nitrite, an extremely rugged ceramic material. The combination of the heating coil & ceramic sheath enable higher temperatures & extremely short preheating times due to excellent thermal conductivity. Also, ceramic glow plugs have a more compact design. This is important, because there is very little free space in todays engines.DIMENSIONSHex (mm):10 Thread diameter (mm):M10 Thread pitch (mm):1.00 Overall length (mm):132.8 Heater tube length (mm):29.3 Terminal (mm):4 mm Pin Marked voltage :7 VIf you are unsure as to whether this is the correct part for your vehicle, please don't hesitate to contact us. Alternatively please use the cross reference table above.