Includes (4) BP8H-N-10 Spark PlugsThread Size: 14mm, Thread Pitch: 1.25mm, Seat Type: Gasket, Reach: 12.7mm (1/2").Hex Size: 13/16" (21mm), Terminal Type: Solid, Overall Height: JIS, Gap:.039" (1.0mm)Material: Nickel, Type: V-Cut, Size: 2.5mm, Projection: ProjectedNGK standard plugs are constructed for longer life and optimum performance.Compatible with the Following:Autolite: 4092, Denso: 5380, 6058, IWF24, W24FPR-U10, NGK: stk 4838