Royal Enfield 350 twin spark NGK Iridium Spark Plug set of 2Royal Enfield 350 twin spark NGK Iridium Spark Plug set of 2 note this is compatible for only those classic models which has double spark plug and the tip of 1 plug is bigger and another is smaller Pack included Part number: BPR5EIX x (1 Nos) CPR8EAIX 9 x (1 Nos) Model: NGK Iridium IX Iridium spark plugs are globally the best performance category of spark plugs having superior technology. These spark plugs use very precious Iridium metal at the tip of