Efficient Air Filter: Our lawn mower air filter is compatible with Briggs and Stratton lawn mower engines, which can filter 98% of impurities and contaminants at ten microns or more, to keep the air intake clean and prevent the engine from inhaling air with impurity particles. Size and Quantity: L 110 x W 68 x H 35, 2 holes with an inner diameter of 28mm, containing 2 lawn mower air filter cleaners with 1 spark plug, which can be replaced regularly to meet your your replacement needs. Practical Design: This air filter adopts an oval pleated paper design on the outside, which provides excellent protection for the engine and prevents the destructive effect of dust inhalation. High-quality materials: Our air filter is made of sturdy and durable plastic, with good pressure resistance, corrosion resistance and water resistance. Wide applications: Compatible with most Briggs & Stratton 550E, 550EX Eco-Plus, 09P000, 575EX Series with Filter Paper. Specification: Material: Plastic + Paper