Includes (4) BR8ES Spark PlugsThread Size: 14mm, Thread Pitch: 1.25mm, Seat Type: Gasket, Resistor Value: 5K Ohm, Reach: 19mm (3/4").Hex Size: 13/16" (21mm), Terminal Type: Removable Nut, Overall Height: ISO, Gap:.031" (0.8mm)Material: Nickel, Type: Standard, Size: 2.5mm, Projection: Non-ProjectedNGK standard plugs are constructed for longer life and optimum performance.Compatible with the Following:Autolite: 3704, 402, 4063, XS4063, Bosch: W4CC, WR4CC, WR4CP, WR5CC, Champion: 818, 8902, OE108, T10, ON3, QN3, QN3C, RN2C, RN3, RN3C, Torch: F8RC