Century Heavy Duty 15M/30F 18 inch Dogbone Electrical Adapter with Pro Grip Handle and Pro Glo Lighted Ends Pro Grip nylon handle allows the adapter to be safely and easily disconnected Pro Glo lighted ends confirm adapter is functioning and electricity is flowing. Green light indicates continuous ground and Amber light indicates power is available. 18 inches long. 15A Male (5-15P) to 30A Female (TT-30R) Please check both ends of the adapter for compatibility with your application before ordering. Great for RV, Motorhome, Generator, Welder, Welding, Electric Vehicle (EV), Auto, Car, Marina Shore Power and Boat applications.