Center Electrode Core Material: Copper Core Center Electrode Tip Material: Nickel Ground Configuration: Standard Ground Electrode Core Material: Nickel Core Ground Electrode Quantity: 1 Ground Electrode Tip Design: Standard Hex Size: 13/16" Insulator Height: 60.00 mm Manufacturer Heat Range: 6 Pre-Gap Size: 0.036 in Reach: 0.429 in Resistance: 1 Ohms Seat Type: Tapered Thread Diameter: 18.00 mm