The plug that you choose should contribute to achieving the engine's full potential. Spark Plug 828S are reliable spark plugs. This standard spark plug with electrodes is made of a nickel alloy. All Champion's conventional plugs include a zinc-plated casing that resists corrosion. This Champion spark plug contains a copper core electrode that increases conductivity and regulates heat for improved overall durability. Key Features: Triple coating provides superior corrosion protection. Dependable functionality. Industry's most robust triple-seal assembly Precision-rolled threads meet all manufacturer specifications. Copper core enhances efficiency and durability. Champion Marine Spark Plugs have a low RFI rating. Resistant to overheating under severe load conditions Specifications: Brand: CHAMPION SPARK PLUGS SKU: 828S UPC: 037551660209 Weight: 3.17 LBS Manufacturer Part Number (MPN): 828S Thread Diameter: 14mm Thread Pitch: 1.25mm Seat Type: Gasket Reach: 12.7mm (1/2") Hex Size: 13/16" (21mm) Terminal Type: Solid Material: Nickel Type: Standard Size: 2.5mm Resistor Type: Inductive Heat Range: 77 Type: Copper Plus Small Engine