Package includes: 2 lawnmower air filters, 1 air filter cover, 1 carburetor primer bulb, 1 4106 spark plug. Air filter: It can filter out impurities and contaminants, keeping the air intake clean and preventing the engine from inhaling air containing impurities. 595660 air filter cover: This lawnmower cleaner cover makes starting and running the engine easier, increasing its performance with guaranteed optimal operation. Lawnmower primer bulb: The carburetor primer bulb is made of high-quality rubber and plastic, with good oil resistance, aging resistance, not easy to break. Wide applications: Compatible with MTD Troy Bilt 590581 08P502 08P602 series engines 09P602 09P702, durable, stable, washable.