NGK (4006) BPR5ES Standard Spark Plug for Longer life and optimal performance. Used in a variety of Briggs & Stratton Engines and Kohler Engines. Always consult your Manual.System RequirementsOuter Thread [mm] : 14.0Spanner Size: 20.8 mmSpark Plug: interference Suppression 5 kOhm; with gasket seat; Unscrewable SAE connector; Nickel Middle Electrode; 1 - Earthed ElectrodeSpark Position [mm] : 3Thread Length [mm] : 19Box Contains1 x NGK BPR5ES Spark Plug