Champion Power Equipment 30-Amp RV Generator 30-ft / 1 3-Prong Outdoor Heavy Duty Locking Extension Cord in the Extension Cords department at Lowes.com
VEVOR Extension Cord 25 ft. 10 Wire Gauge Heavy-Duty Outdoor Welder Extension Cord with 3 Prong 30 Amp Power Extension HJLJQ10-3-25FTYCXV1 - The Home Depot
AC WORKS 25 ft. L5-30P 30 Amp 3-Prong Generator Locking Plug to Household Tri-Outlets Extension Cord L530W515-025E - The Home Depot
AC WORKS® L5-30 SOOW 10/3 3-Prong Generator Extension Cord – AC Connectors
Superior RV EC3025HL Outdoor RV Power Extension Cord - 30 Amp - 25 Ft.
25 FT RV Power Extension Cord NEMA L5-30 3 Prong Locking 30 Amp For Outdoor Use | eBay
Leisure Cords NEMA L5-30 3 Prong 30 Amp Generator Extension Cord 50 ft | eBay
30 Amp 3-Prong NEMA L5-30P/L5-30R RV Generator Extension Power Cord – Tooliom
Houseables Generator Extension Cord, Electric Wire, 3 Prong, 30 Amp, 250 Volt, Single, Black, 25 Ft, All Rubber, 10 Gauge, Heavy Duty, L6-30, Commercial, Electrical Power Cable, with Locking Switch - Amazon.com