Telephone Landline Extension Cord Cable Line Wire with Standard RJ-11 6P4C Plugs Male RJ11 to male RJ11 Telephone Cables are used for standard RJ11 phones.For use with telephones, fax machines, modems, answering machines, etc. Product structure: conductor: copper wire diameter: 0.4 copper(single) size:10M/15M/20M//30M meters (plus or minus two percent) line core: 4 root insulation: HDPE wire shield: PVC 1 Product features: Color: White Product features: Thicker copper cores in wires up to 26 AWG, which is much better than ordinary Copper-clad-Steel or thin copper cores telephone cable, And contacts of plugs are coated with thicker gold plate than normal ones on market. 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.