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