7-Way RV Trailer Cable is composed of a heavy duty PVC jacket compacting insulated Primary Wire Conductors to protect against environmental elements, chemicals and abrasion. Cable constis of two 10 gauge, one 12 gauge and four 14 gauge conductors. The Trailer Cable becomes an integral part of a Tow Vehicle to Trailer's electrical system supplying power to brakes, safety and lighting systems. The Conductors are color coded to enable easy identification and follow industry standards.