Universal Braided Spark Plug WiresIntended for use with electronic ignitions 37” wire length can be cut to reach anywhere it needs to go External braided cover is made of fiberglass Insulation diameter is 6-6.5 mm with 0.5 mm fiberglass outer cover Tin-plated copper wire with silicone insulation jacket and fiberglass coating along with silicone boot combine to make these wires flame retardant and high temperature resistant