4 Prong 30-AMP 10-Feet 250-Volt Generator Extension Cord NEMA L14-30p to L14-30r Generator Power Cord for Manual Transfer Switch, Portable Generators - China Locking Power Cord L14-30p L14-30r | Made-in-China.com
30 Amp 3-Prong NEMA L5-30P/L5-30R RV Generator Extension Power Cord – Tooliom
AC WORKS® L5-30 SOOW 10/3 3-Prong Generator Extension Cord – AC Connectors
Leisure Cords RV Generator Adapter with 30 Amp 3 Prong Locking Male Plug to RV 30 Amp Female Standard Connector (3-Prong) - Walmart.com
SEEUTEK 25 ft. 10/4 30 Amp Generator Extension Cord 4 Prong 125-Volt Indoor/Outdoor Extension Cord L14-30 with Lighted End Black BZ-1398 - The Home Depot
parkworld 25 ft. 10/3 3-Wire Generator 30 Amp 125/250-Volt 4-Prong Locking L14-30P to 30 Amp 3-Prong 10-30R Adapter Cord 886139A - The Home Depot