E3.10 is a 14mm, 0.375” reach plug with a gasket seat. It is used in multiple small engine applications, especially lawn and garden. The ground electrode is designed with E3’s patented DiamondFIRE technology which is proven to improve power, increase fuel efficiency, and dramatically lower hydrocarbon emissions in long-term use. The unique ground electrode and full-size center electrode also provides optimal performance over an extended product life.Replaces: CHAMPION: J17LM, J19LM, J8C, RJ17LM, RJ19LM, RJ8C, 5861 NGK: B2LM, B4LM, B6S, BR2LM, BR4LM Specifications Brand E3 Spark Plugs Part Number MPN: E3.10 Product Line Diamond Fire Plug Length Short Core Type Non Resistor Core Material Copper Tip Material Copper Insulator Type Projected Thread Size 14 mm Reach 0.375 in Seat Type Gasket Wrench Size 13/16 in Ground Strap Quantity 1 Quantity Each California Residents: Proposition 65 warning