This genuine Stihl air filter features a durable open-cell foam element designed to protect and maintain the performance of Stihl petrol-powered equipment. The foam construction helps trap fine dust and debris while allowing proper airflow for efficient engine operation. Suitable for select Stihl brushcutters and compatible tools, including the FS 120 and FS 400, this air filter supports dependable starting, steady power delivery, and long-term engine reliability.