Nice Premium Spark Plug Wires. Fit Top Entry style Distributor Cap for 1955-1980 MGA MGB and MG Midget. Made from Stainless steel Mag winding which delivers maximum voltage to the spark plug for a hotter, more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static. The outer jacket is made from 100% Pure silicone jacket resists oil penetration, for lifetime protection against wire set failure. And the inner wire jacket is made with EPDM inner insulation stops power-robbing voltage leaks.