The E3.10 lawn and garden spark plug is designed to optimize performance for 4-cycle overhead valve small engines making it the ideal choice for a wide variety of lawn and garden applications. Featuring a 14mm thread diameter and 0.375-inch reach with a gasket seat this premium spark plug is built for durability and efficiency. The patented DiamondFIRE ground electrode delivers enhanced power improved fuel efficiency and a significant reduction in hydrocarbon emissions. Its innovative design helps to create an edge-to-edge spark path promoting more complete combustion and better overall engine performance. This spark plug s design also minimizes carbon buildup significantly extending its life while maintaining optimal performance for longer periods. Compatible with Champion plugs such as J17LM J19LM J8C RJ17LM RJ19LM RJ8C and 5861 and NGK B2LM B4LM B6S BR2LM and BR4LM. With a proven ability to increase power by 6% to 12% (depending on engine class) improve fuel efficiency by 4% to 13% and reduce CO and hydrocarbon emissions the E3.10 spark plug is a highly efficient and eco-friendly option. Backed by a limited lifetime guarantee this spark plug ensures smoother acceleration and long-lasting engine performance.