SmartPlug Systems 50Amp SmartPlug Female Connector to 50Amp Male 4' Twist-type Connector. Featuring a multi-point locking system where side clips lock the plug body securely into the inlet which eliminates any stress on the electrical connection from movement of the power cord. With weatherproof seals where gaskets are installed in the interior of the plug body which elminate any water penetration when plug is connect to inlet.