This ignition wire set features black wires with a tinned copper weld wire core, silicon insulation, and a fiberglass reinforced jacket It is ideal for racing applications where radio frequency interference is not a concern and is also a great choice for Magneto, point-type, and non-electronic ignition applications. It has a low profile, silicone finger grips, and vibration proof double spring lock terminals. It is available with 180-degree spark plug boot ends and is designed to withstand temperatures over 600-degrees F.