NGK LPG4 / 1511 LGP Spark Plug Genuine NGK ComponentLPG Laser Line sparkplugs have an iridium tipped centre electrode and a ground electrode that contains a platinum chip. The chip of iridium is attached in a specially developed laser welding process patented by NGK. The advantage: These preciousmetalsareresistanttotheunfavourable conditions in gas powered engines. The spark gap remains virtually unchanged throughout the entire service life. Suitable for use with *LPG and *CNG Double precious metal design: laser welded Special metal shell protection: Countermeasure to high corrosion characteristics of gas engines Easy installation: preset spark gap BOX DIMENSIONSHeight (mm): 78Width (mm): 22Length (mm): 20 If 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.