The pre-filter is made of soft sponge to filter out some impurities in the air and is the first barrier to protect the filter paper.The inner and outer two-layer metal mesh design is the second barrier to protect the filter paper.HEPA filter paper can filter out more impurities, provide better protection, and ensure that the engine runs smoothly and efficiently.Superior quality Factory-made, experienced. Strict detection, excellent workmanship. Accurate size, same as the original. Accurate Size Length: 3.94 in(10 cm). Width: 2.95 in(8.9 cm). Height: 3.54 in(7.6 cm). Center hole diameter: 1.61 in(4.1 cm). Net weight of single air filter: 4.23 oz(120 g). 4. Warm Reminder Air filter is an important factor affecting engine performance and the first line of defense to protect engine. When your lawn mower emits black smoke, please replace air filter in time to ensure the normal operation of engine, improve engine performance and ensure working efficiency
