Denso Copper Plug Number K16TR11 Spark Plug - 3194 Part #: 3194 Line: DEN Denso Copper Plug Number K16TR11 Spark Plug 1 Year Limited Warranty Seat: Gasket Thread Size: M14 Heat Range: 16 Hex Size (mm): 16mm Center Electrode Core Material: Copper Center Electrode Tip Material: Nickel Approximate Resistor Value (Ohm): 5000 Ohm Ground Electrode Tip Material: Nickel Service Number: K16TR11 Metallurgy: Copper Show More Show Less