Conntek 20601-020 20-Feet, 30-Amp 125/250-Volt L14-30P/R , 4 Prong Transfer Switch Cord/Generator Extension Cord
Generator Extension Cord, 3 Pole, 4 Wire Grounding, NEMA L14-30P to NEMA L14-30R 30A 125/250V Max Power: 7500W, Stays flexible in cold weather, Heat Resistant up to 221F    Rating 30A 125/250V   Cable SJTW 10/4   Cord Length 20ft   Configuration NEMA L14-30P to NEMA L14-30R   Approval Plug, Connector, and STW: UL, C-UL   Warranty Limited one year warranty