Our air filter is made of HEPA filter paper and rubber, which is very breathable and can effectively prevent tiny particles from entering your carburetor and engine. Excellent filter paper helps to improve machine performance by reducing the amount of dust that can enter the machine. The pleated paper air filter with a flat filter plate provides maximum protection against the destructive effects of dirt. Large filter area engine breathes easier. Including 2 pieces of lawn mower air filters, enough for daily use and replacement. The compatible filter protects the engine of your lawnmower from dirt. Regularly replaced filters improve engine performance and thus provide reliable, long-term protection for your lawnmower tractor.< /p>