Kit Content:6 x Denso U-Groove Conventional Spark Plugs Gap 0.0406 x Denso Direct Ignition CoilsPart Attributes:Voltage: (Direct Ignition Coil) 12 VoltColor: (Direct Ignition Coil) GrayPre-Gap Size: (U-Groove Conventional Spark Plug) 1.0 MillimeterThread Diameter: (U-Groove Conventional Spark Plug) 14.00 MillimetersHex Size: (U-Groove Conventional Spark Plug) 16.0 MillimetersReach: (U-Groove Conventional Spark Plug) 19.00 MillimetersGround Electrode Quantity: (U-Groove Conventional Spark Plug) 2Manufacturer Heat Range: (U-Groove Conventional Spark Plug) 20Resistance: (U-Groove Conventional Spark Plug) 5000 OhmsCenter Electrode Core Material: (U-Groove Conventional Spark Plug) CopperSeat Type: (U-Groove Conventional Spark Plug) FlatGround Configuration: (U-Groove Conventional Spark Plug) Multi-ElectrodeGround Electrode Tip Design: (U-Groove Conventional Spark Plug) Multi-ElectrodeCenter Electrode Tip Material: (U-Groove Conventional Spark Plug) NickelGround Electrode Core Material: (U-Groove Conventional Spark Plug) Nickel