E3.14 Spark Plug,Natural Product Description Designed to increase horsepower and lower emissions -- Features FOR OPTIMAL PERFORMANCE: Spark plug that fits a variety of 2- and 4-cycle engines, designed to increase power, reduce fuel consumption, and improve hydrocarbon emissions PATENTED TECHNOLOGY: DiamondFIRE features a unique design with an edge-to-edge spark path, which allows replenishment of the spark zone with a fresh fuel/air charge INCREASED DURABILITY: Near elimination of performance inhibiting carbon deposits, which dramatically extends the life of the spark plug WHAT'S INCLUDED: One (1) E3.14 spark plug with a limited lifetime warranty. Features 14mm thread diameter; 0.375-inch thread reach plug with gasket seat; 3/4-inch hex size REPLACES: Champion J17LM, J19LM, J8C, RJ17LM, RJ19LM, RJ8C, and 5861; NGK B2LM, B4LM, B6S, BR2LM, and BR4LM. Often used in lawnmowers USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.