... insulation 1.Product Name: HVV 4*0.5 Telephone cable Color Code 2.Specification:0.5mm BC conductor HDPE Insulation PVC ... Conductor/mm Insulation/mm Jacket PackingXHL-1303Telephone CableHVV 4*0.5 0.5BC PE0.89 Grey PVC 100m/axis*20ctn3.Usage: ... equipment of the audio link , support the low speed data transmission, language application, digital telephone, fax, pabx, digital equipment connection ...