Genuine NATO electrical cable from the Dutch military. Measures ~19 feet long and is made of a pair of 12mm OD copper cables with a very high strand count for superb flexibility. These are nothing like those wimpy auto-parts-store jumpers that are 90% insulation with tiny copper cores - they are heavy and ready to transfer extreme loads with low resistance.
New surplus female receptacles are available online, if desired - just ask for the link.
PM for details.