Camco 55623 RV 50' 50-Amp Male and 50-Amp Female PowerGrip Marine Locking Extension Power Cord - Walmart.com
RV 50 amp locking power cord, 50 ft.
Amazon.com: RVMATE 50 Amp 25 Feet RV/Generator Lockable Power Extension Cord, Easy Plug in Handle, 14-50P to SS 2-50R with LED Indicator, ETL Listed : Patio, Lawn & Garden
RV Power Cord 50 ft 50 amp Rain Proof 90° Twist Lock Connector, 50 Foot / 50Amp | eBay