uvital 100 feet telephone landline extension cord cable line wire with standard rj-11 6p4c plugs(white 30.5m,1pack) uvital uvital 100 feet telephone landline extension cord cable line wire with standard rj-11 6p4c plugs(white 30.5m,1pcs) product structure: * conductor: copper * wire diameter: 0.4 copper(single) * size: 30.5 meters (plus or minus two percent) * line core: 4 root * insulation: hdpe * wire shield: pvc product features: single insulated wire according to the different pitch twisted pair, and with specified color combinations to identify line, reduce the mutual interference between the clues crosstalk, power consumption is small. scope of application: telecommunication engineering wiring, links between indoor telephone communication cable system wiring, voice communication system between the main line, program-controlled switches, phone, fax and digital television.