LilyGlory Solar Panel MC4 T Y Branch Connectors Cable Splitter Coupler -1x MC4 Y solar panel adapter M/M/F with black color finish - Two male MC4 connectors on one end and one female MC4 connector on the other end -1x MC4 Y solar panel adapter F/F/M with black color finish - Two female MC4 connectors on one end and one male MC4 connector on the other end -Standard MC4 connectors with self-locking key allow instant easy installation -Sunlight, ozone, and UV resistant; Moisture resistant; Waterproof -See photo gallery above for all technical specifications and example wiring diagram