SEEUTEK 40 ft. 10/4 30 Amp Generator Extension Cord 4 Prong 125-Volt Indoor/Outdoor Extension Cord L14-30 with Lighted End Black BZ-1399 - The Home Depot
25Feet Generator Extension Cord NEMA L14-30P to Four 5-20R 4 Prong 10 Gauge | eBay
Conntek NEMA L5-30 30A 125V Generator Extension Cord
25 ft. 30A 125V Generator Extension Cord - Champion Power Equipment
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