Conntek 14355 RV Pigtail Adapter RV 30 Amp Male Plug To 30 Amp Locking Female Connector
RV Camp Power Pigtail Adapter Cord, NEMA TT-30P to NEMA L5-30R, 2 P / 3W Grounding, 30A straight blade to 30A Locking Connector with Threaded ring & led light. Comparable with Marinco 1PCMRV  Approval:  Plug, Connector, and STW: UL, C-UL Cable: 1.5FT STW 10/3, Rating: 30A 125V