Amazon.com: 30ft RV Extension Cord 30 AMP (TT-30P/L5-30R) with Twist-Lock Connector and Grip Handle, Hook and Loop Strap - STW 10/3 AWG 125 Volt - Heavy Duty - by LifeSupplyUSA : Tools
Halex 25 ft. 10/3 30 Amp 125-Volt Marine Shore Power Extension Cord 31225 - The Home Depot
parkworld 50 Amp Generator to Transfer Switch Inlet Box Adapter 30 Amp 125/250-Volt NEMA L14-30P Plug to 50 Amp Twist Lock CS6364 78295 - The Home Depot
Amazon.com: Kohree 25' RV Power Extension Cord 30 Amp Twist Lock RV Adapter Plug 30M/30F with RV Power Adapter 15 Amp to 30 Amp, LED Indicator & Grip Handle, 125V, 3750W, ETL
RV Power Cord 25 ft 30 amp Detachable Cable with LED Twist Lock Connector | eBay