This Slim Telephone Cable is made from high-quality matetial for long use in rough weather conditions.They Come with 4 Core Telephone Cable cords or 8 Core Telephone Cable cord. RJ11 6P4C female to female inline coupler, which can be used to connect and extend two existing telephone lines with R11 connector.Our telephone cable can be used for telephones, caption phones, fax machines, modems, Printer fax, etc. Except telephone cable, our factory also supply CAT5E Ethernet Cable and CAT6 Ethernet Cable as well as CAT7 Ethernet Cable.