Marinco P30-504RV-25 RV Trailer Camper Pigtail Locking Adapter 30A M To 50A 25' Power Cord Adapter; RVEEL; For Providing 50 Amps To RV From 30 Amp Standard Power Outlet; Polarized For Use With RV Only; 25 Foot Length; With Handle Uses The New RV Easily Engaged Lock Technology CSA Approved Waterproof Sealing Collars: Where Indicated, A Sealing Collar Provides Maximum Moisture Protection Between Connector And Cordset