10 Pairs of HC4-PV10C HC4-PV10C MC4 Male/Female Solar Panel cable Connectors 10 Pairs of MC4 Solar Panel Cable Connectors (10 Pcs of MC4 Male, and 10 Pcs of MC4 Female) The Conductor Pin is Tinned Copper: It makes a rock solid connection after you crimp the pin to the wire, and these are operated perfectly under heavy load. No Longer To Deal with Fixing the Connectors On The RoofThe O ring on connection is perfect to seal out water and dust to prevent corrosion. Quick & simple It is still able to disconnect if needed,and these connectors will survived rain, high force winds and snow.processing and simple removal of plugs Quick & simple assembly processing and simple removal of plugs without the aid of any extra instrument.