CDI Electronics' (934-7124) Copper Core Spark Plug Wire. Spark plug wire replacement for CDM Modules. Spark plug wires, sometimes called "ignition cables," conduct high voltage electricity between the ignition coil(s) and the spark plugs. The premium tin-plated copper core generates the most spark possible at the plug. This is a fantastic addition to your boating needs. Made of rugged materials, it will endure a long time. CDI Electronics is a world-renowned pioneer in providing dependable, cost-effective electronic ignition and diagnostic devices. CDI has earned ISO 9001 accreditation, a globally recognized mark of quality and commitment to 100% customer satisfaction. Key Features: Crafted with precision using the finest materials Complies to SAE specifications Inner insulation made of EPDM 8mm copper core CDM module spark plug wire Boots made entirely of silicone Steel terminal with a zinc plating Maximum spark at the plug with tin-coated copper core Specifications: Brand: CDI Electronics SKU: 934-7124 UPC: 736983856890 Weight: 0.80 LBS Manufacturer Part Number (MPN): 934-7124 Application: Mercury-Mariner Replacement spark plug wire for CDM Modules.