【Set】There are 13 lawnmower replacement parts, including 2 yellow air filters, 1 L7T spark plug, 2 primer pumps, 4 carburetor diaphragm gaskets, and 4 governor springs. 【Air Filter】The air filter foam is made of high-quality materials, is highly adaptable, wear-resistant, heat-resistant, and durable. 【L7T Spark Plug】The spark plug has good heat resistance and electrical conductivity, which improves fuel efficiency and reduces emissions. 【Application】The lawnmower maintenance kit is used to replace parts on many small engines and is very suitable for Murray, Craftsman, Classic, and Sprint 3.5-4.5 HP vertical engines, MTD, Briggs & Straton, and many others.