Compatible with STIHL MS290 MS310 MS390. The number is 11270074100, please check carefully. The filter structure is reasonable to ensure the cleanliness of the fuel system, prevent impurities from clogging the injector, and maintain the engine power output. The L7T spark plug has ignition performance and high temperature resistance, improves starting sensitivity, ensures full engine combustion, and reduces emissions. Contains 1 air filter, 1 L7T spark plug and 1 filter, a complete set., Manufacturer: YINETTECH