Cnornus Air Filter 4137-124-2800 and Pre Filter 4137-124-1500 Cleaner Replaces for Stihl FS76 FS80 FS80R FS85 FS75 FS85R FS85T FS85RX FC85 BG75 HS80 HL75K HT75 String Trimmer

Air Filter helps eliminate contaminating of dirt, dust and debris from the carburetor and engine. It provides excellent protection against ingested dirt, improves airflow and prolongs engine life by providing clean filtered air while running. Used on the following models: Stihl FS74 FS75 FS76 FS80 FS80R FS85 FS85R FS85T FS85RX BG72 BG75 Stihl HS75 HS80 HS85 HL75 HL75K FH75 HT70 HT75 KM80 KM85 KM85R SP80 SP85 FC75 FC85 14187PF 14187F Stihl 4137 124 2800 Stihl 4133 124 2800 Pre-Filter Replace Part Number Stihl 4137 124 1500 Product Features Low differential pressure, ensuring optimum engine air-fuel ratio, reduce filtration loss. High humidity, preventing the filter element from sucking and causing the filter element to be broken down. Good filtration performance, can filter out 99% of harmful substances.