[DURABLE]: Heavy duty and premium quality cable cord Made from high quality material to last in rough weather conditions. Durable for everyday use. [CLEAR AND PLEASANT COMMUNICATION] Designed for superior signal transmission. The cores of wires are made of Pure-copper material, thickness is up to 26AWG, which is much better than ordinary Copper-clad-Steel telephone cord or most telephone cords with thin copper cores on market, And contacts of plugs are coated with thicker gold plate than normal ones on market. Both ensure great connection and conservation quality. Make your phone call and reply more pleasant. [Wide Application] Phone line length of 20 ft, 6p4c connector.This telephone cords for landline phone comes with two RJ11 standard phone connectors on both ends , which can be used for telephones, fax machines, modems, answering machines, etc