A Pair of HQST 10Ft 12AWG MC4 Solar Extension Cables Hard plastic connectors at each end,female and male connectors. Black wire sunlight resistant cable,extends and locks built-in cables. UV resistant and waterproof,TUV tested cable. TUV logo print per feet indicates that the cable meets TUV standards for PV solar application. Make more space between your solar panels and between your solar panel and charge controller.