Marinco 124ARV 50-30 Amp Twist Lock RV Adapter Allows 50 amp, 125 or 250 volt cord set plug into a 30 amp, 125 volt RV straight blade receptacle. Molded heavy-duty 30 Amp plug constructed for durability reliability Waterproof sealing collars providing maximum moisture protection between the connector cordset Twisting lock feature ensures a secure connection between cords 12 long robust 10 gauge3 wire cord Power rating 125250V CSA approved Color Yellow Compatibility Can be used with Class A, B,