These brass spark plug terminal nuts will fit any modern spark plug with a removable top nut. This includes NGK, Champion, and any other major brand. Also included are nickel-plated Rajah ring terminals. Add some vintage flair to your stock bike or your custom bobber or chopper. These are a screw on style, you strip the end of your plug wire, insert, and screw the terminal on, as shown below. The ring terminal is held in place firmly with the brass spark plug nut. Two brass nuts and two Rajah ring terminals are included. These may not be compatible with electronic ignitions that require resistor caps.