Charging / Ground/ Battery Cable. 250MCM Approx. 54″ Long. 3/8″ Loop Terminals. Used in conjunction with a 28 Volt, 570amp alternator. Measure .70″ OD with insulation. Aircraft quality construction. NSN 6150-01-579-6097. Heavy Duty Mil-Spec component that is new-in-the-box too 14579 R5B3