Oxygen sensor plug size is M18 x 1.5 thread, suitable for all standard O2 sensors Welding plugs are easy to weld, providing users with an excellent experience, very practical Very suitable for custom exhaust devices, headers, down pipes, etc. helps a lot Iron electroplated nickel material, possess corrosion resistance, wear resistance, and high stability Contains nut and plug, which can play a good blocking effect without loosing, very reliable Scope of application: general purpose Weight: about 80g Color: Silver Material: nickel-plated iron Quantity: 1set Packing list: 1* plug 1* nut 1* copper washer Only the above package contents are included, no other products are included. Note: The reflection of light and different monitors may cause the color of the item to be slightly different from the actual item. Measurements allow +/- 1-3 cm.