The Champion Copper Plus 852-1 Small Engine Spark Plug allows you to get more life out of your equipment. It s sized and threaded for small engines such as those in lawn mowers. This copper core spark plug is highly conductive to create consistent arcs for reliable start-up of your vehicles and equipment. The copper core center electrode allows for accurate control of heat range optimizing longevity. It s built to both SAE and ISO standards to ensure reliable performance.