Sumnacon 10 Pairs of HC4-PV10C MC4 Male/Female Solar Panel cable Connectors 10 pairs of MC4 Solar Panel Cable Connectors(10Pcs of MC4 Male, and 10Pcs of MC4 Female) Double seal rings for better waterproof effect Quick & simple assembly processing and simple removal of plugs without the aid of any extra instrument Resistance of extra high & low temperature and fireproof Compatible with PV cables with different insulation diameters