Amazon.com: Kutatek 50Ft Heavy Duty Generator Extension Cord,NEMA L14-30P to Four 5-20R, 4 Prong, 30 Amp 125/250V 7500 Watts, 10 Gauge SJTW Flexible Cable, Twist Lock : Tools & Home Improvement
25 ft. 30A 250V Generator Power 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