If 7mm or 8mm wires aren't large enough for you or you have a high output ignition system that's overpowering your current wires, then these 10.4mm diameter suppressed wires are the ones for you! Features include: 8mm silicone ignition wire core, woven fiberglass over-braid and silicone jacket top layer. Comes with a 32" unassembled coil wire that can be cut to your exact length. Made in USA.