Notes : 5/8 in. Hex Size; 55 mm Insulator Height; 5,000 Ohms; (1) Ground Electrode; Non-Removable Nut Electrical Terminal; Standard Ground Configuration; Nickel Ground Electrode Core Material; Standard Ground Electrode Tip Design; Tapered Seat TypeSeries : V-Power SeriesElectrode Tip Material : Nickel with V-groove Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty