30A L14-30 4-prong Locking Plug Generator Extension Power Cord | 10 AW – Ceptics
ONETAK NEMA L14-30P to 14-30R 120V/240V 30 Amp 4 Prong Male Plug Twist Lock to 4 Prong Female Receptacle Dryer Welder EV Charger RV Generator Power Cord Adapter - Newegg.com
VEVOR 30-Amp Generator Extension Cord, 25 Feet, 125V 3750W Heavy Duty Generator Outdoor Power Cord, NEMA L14-30P / Four NEMA 5-20R STJW Flexible Power Cable with Twist Lock Connectors, for Generators
MaxxHaul 30-Amp 125/250-Volt NEMA L14-30p Watertight 4-wire Industrial Locking Connector, Black at Lowes.com