Cable Telephone, NSN# 6145-01-047-4345. WD-1A/TT have two twisted, individually insulated conductors and the WD-1A/TT has two insulated conductors bonded together. The conductors have the following characteristics: • Four tinned-copper strands. • Inner insulation of polyethylene and outer nylon insulation jacket. • Tensile strength of approximately 200 pounds (both conductors). * Weighs 13 pounds * 1760 feet of wire or 1/3 of a mile The wire is on a DR-8-A reel.