The One Female to Three Male (F/MMM) and One Male to Three Female (M/FFF) MC4 Solar Panel Branch Cable Connectors In Pair is an easy solution to solar panel installation. With aging resistance and UV endurance, the connectors have an easy assembly process and feature lower contact resistance and high current carrying capability. They can be used with any PV cables that have different insulation diameters, and is resistant to extra high and low temperatures.