Amazon.com: Houseables 30 Amp Generator Cord 4 Prong, Extension Generator Cable, 10 FT, 125-250v, 7500 Watt Max Rating, UL CUL, NEMA L-14-30P, Rubber, 10 Gauge, Heavy Duty, L14-30, Transfer, Twist Lock Power
Century Wire D13011050 50 ft. 10/4 SJTW Power Generator Extension Cord (Black) - Walmart.com
BENTISM 50 ft RV Extension Cord, 30 Amp, Heavy Duty STW RV Power Cord, NEMA TT-30R Female NEMA TT-30P Male Plug, with LED Indicator Handle 15A Adapter, for RVs, trams, generators, Campers,