Bosch 0242145606 / AAR5NIP Iridium Spark Plug Petrol Ignition Part Equipped with an iridium firing pin at the center electrode: Bosch Iridium spark plugs are developed to the same high quality as original equipment & engineered for high performance in gasoline engines. Developed with the same high quality which we supply to original equipment: Outstanding spark plug technology which meets exactly the requirements of the respective engine Fine wire 360&176; continuous laser welded platinum firing pins & a yttrium enhanced tapered platinum ground electrode inlay: For enhanced combustion & service life Ribbed insulator design: Prevents misfires due to flash-over Large copper core center electrode: Enables an enhanced heat transfer Item Specifics: Electrode Material: Iridium Short Code: AAR5NIPGap: 0.7mm Thread: M12 Thread Length: 25 mm Hex Size: 14 mm Number of Electrodes: 1OE Numbers: 12673527, 12683541, 12686362, 55490097, H6BG12405AA, 2207424