MC4 T3 Connector (1500V/50A) 3 IN 1 T3 BRANCH WIRE CONNECTER FOR SOLAR PANEL ?T3 Branch Connector?1 male to 3 female(M/FFF) and 1 female to 3 male(F/MMM). It is compatible with solar connectors in 10AWG to 14AWG. It could be used for connecting two solar panels in parallel. ?Waterproof and Durable? An IP67 WATERPROOF RING on connection is perfect to seal out water and dust to prevent corrosion. It is stable and safe with the built-in lock which is durable in outdoors environment. ?Easy Installation?Male is easy to lock and open from Female.The connector is stable and safe with the built-in lock which is durable outdoors.