Sufficient Quantity: This air filter compatible briggs and stratton can be used to keep the air intake clean, to prevent the engine from inhaling air containing dirt particles during operation. Our set contains 2 lawn mower air filter cleaners, which can be compatibled regularly to meet your compatiblement needs without spending extra time to purchase. High Quality Materials: This air filter is made of durable plastic, which is safe, durable and practical. Has good resistance to pressure, corrosion and water. It is easy to carry and operate, and can be used compatible a long time to maximize engine life. Pleated Paper Design: This oval style pleated paper air cleaner protects against the destructive effects of dirt ingestion, the air cleaner design makes it highly breathable despite high filtration which provides excellent engine protection and prevents the destructive effect of inhaling dust. . Effective protection: suitable compatible most lawn mower engines and can be used to keep the air intake clean to prevent the engine from inhaling air with dirt particles when working, which increases the rate of abrasion and damage and prevent early engine wear, prevent premature engine wear and prolong the service life, thus ensuring the reliability of the mower. Fitment: Our compatiblement air filter is an ideal compatiblement compatible Briggs & Stratton 491588 491588S 399959, John Deere PT15853.