UL & cUL approved and Listed, Heavy-duty for Camper,100% copper conductor inside. RV 3-prongs TT-30 Plug with handle, easy to push and pull, 125 Voltage Shore Power twist lock L5-30 Receptacle with locking ring, with locking ring, 125 Voltage STW 10AWG/3C stranded copper inner wire, support max 30 AMP loading, Max rate 3750 Watt (125V) Length: 4FT, 15FT, 25FT, 36FT, 50FT, 100FT (Feet)