The 7-way trailer cable is made of pure copper, which has excellent conductivity and low resistance to ensure stable performance in harsh conditions. Excellent Structure, UL certified: the 7 way trailer cable complies with the UL certified, ensuring the safe use and stability of the cable; The inner conductor is 100% pure copper, which is more stable than copper-clad aluminum, has better conductivity, is not easy to corrode, and has strong oxidation resistance.