20 gauge, two conductors each, stranded tin coated copper with dielectric core of cross-linked foam Polyethylene, each core one colored white and one colored black. Cross linked Polyethylene filler core, flame retardant, strands to be used to maintain concentricity. Polyester tape wrap; Optimized tin coated copper shield braid. Composite jacket material of extruded Low Smoke, Low Halogen bedding compound bonded to filled, cross-linked thermoset Low Smoke, Low Halogen polymer compound jacket, Method B. Twinaxial. Non-Watertight.