Spark Plug wire 9" for Mercury and MarinerPremium Marine Wire Leads Magnetic Suppression Core Manufactured for your specific application. Features: 9" length; Metallic core wire.; 7mm copper core wire; Durable stainless steel wound conductor for maximum horsepower and engine performance.; Premium silicone jacketing and boots for the ultimate in high temperature protection.; Superior RFI suppression for the most sensitive electronic system.; Corrosion resistant stainless steel spark plug and distributor terminals for maximum conductivity.; Replaces: Mercury; 84-813715A1; Mallory; 9-28005; Redline; RL5227;