... .50mm BC wires 0.93mm PE insulator PVC Outter Jacket type:indoor telephone cable. indoor telephone cable :Indoor use, parallel, 4-core Cooper conductor ... .5~1.13mm, Solid Polyolefin (PE) insulation, PVC Jacket Description: Indoor use, parallel, 2-coreStandards: ISO/IEC 11801, ANSI/TIA/EIA ...