Our LSTTRSA-6 20 gauge cable is part of our Mil-Spec Wire and Cable line of Wire and Cable. LSTTRSA-6 is composed of a bare copper conductor with cross-linked polyethylene (XLPE) insulation, a halogen-free (LSZH) cross-linked polyolefin (XLPO) jacket, and an overall braid shield of tinned copper. These cables are rated for a voltage of 300 volts. LSTTRSA cables are aluminum braid armored, flexing, non-watertight cables with surface marking for telephone use.