A quality 7mm EPDM Metallic Conductor Ignition Wire has a stranded tinned copper wire core with a high dielectric EPDM Rubber insulation jacket. Ideal replacement wire for repairing or replacing current worn or damaged 7mm ignition wires for vehicles not requiring RFI supression. Ignition wires degrade over time and repacing older igniton wires will help improve engine performace and fuel efficiency. Custom designing and building your own wire set can enhance your under hood appearance while improving longevity by careful routing of the wires.