5 pairs of MC4 Male/ Female Solar Panel Cable Connectors Double Seal Rings for Better Waterproof Effect Quick & simple assembly processing and simple removal of plugs without the aid of any extra instrument 5 pairs of MC4 Solar Panel Cable Connectors (5Pcs of MC4 Male and 5Pcs of MC4 Female) Compatible with PV cables with different insulation diameters Resistance of extra high & low temperature and fireproof Load capability with big current and high voltage