Spark Plug - CHA 868 Features & Benefits Dependable Performance. This Champion Spark Plug Features A Copper Core Electrode That Provides Increased Conductivity And Heat Control For Good Overall Wear.; Resists Fouling; Superior Corrosion Resistance; Dependable And Proven Performance; Increased Conductivity And Heat Control For Good Overall Wear; Dependable Performance - Features A Copper Core Electrode That Provides Increased Conductivity & Heat Control, Providing Good Overall Wear Characteristics. Attributes Brand: Champion Spark Plug Hex Size: 13/16 in. Spark Plug Reach: 3/8 in. Spark Plug Seat Type: Gasket Spark Plug Thread Size: 14 mm VMRS Code: 033003005