NGK are the worlds number 1 manufacturere of ignition components. Technical Specification Spanner Size : 20,8 mmEngine Code : AR 01646Engine Code : AR 30585Outer Thread [mm] : 14,0Spark Plug : 1 – Earthed ElectrodeSpark Plug : interference Suppression 5 kOhmSpark Plug : Iridium Middle ElectrodeSpark Plug : Unscrewable SAE connectorSpark Plug : with gasket seatThread Length [mm] : 19Spark Position [mm] : 3Fuel Type : Liquefied Petroleum Gas (LPG)Engine Code : AR 01911