🟢LONG HISTORY - In 1961, Zhuzhou torch spark plug. Co.,ltd. was established at Lukou, Zhuzhou, CHINA. In 1993，TORCH was listed as Shenzhen stock exchange. In 2003，TORCH has become china’s largest spark plug production and R&D base. Subsequently, TORCH bought the full set of equipment and technical patent from DELPHI U.S.A. Spark plug factory, ride into the forefront of the world! 🟢SPECIFICATIONS - Thread diameter:14 mm/Thread length:19mm/Hex size:20.8mm. Please check for correct specifications and measurements for your application!!! 🟢COMPATIBILITY - TORCH F6TC Spark Plug Replace for NGK BP6ES Spark Plug, for Bosch W6D Spark Plug, for CHAMPION N9YC Spark Plug, for DENSO W20EP IW20 Spark Plug, OEM. 🟢PERFORMANCE - Longer Service Life · Fast Starts · Reduce Emissions · Improve Fuel Efficiency · Stable Performance. 🟢APPLICATIONS - Spark plugs are an important part of the ignition system of gasoline or gas engines, and are widely used in many fields such as automobiles, motorcycles, aircraft, garden tools, yachts and industrial engines. specifically designed to increase power, reduce fuel consumption and improve hydrocarbon emissions.