Tektrum UV-Resistant 25ft Long Double Layer PV Extension Cable with MC4 M/F Connectors for Outdoor Solar Panel (Set of 2) 25ft long photovoltaic Extension cable with Black color finish; 12 AWG wire meets tuv requirements A male MC4 (multi-contact) connector on one end and a female MC4 connector on the other end of the cable Standard MC4 connectors allow Instant installation