Amazon.com: 3 Prong Power Extension Cord with Multiple Outlets 4 FT, 16/3 Gauge Multi 3 Outlet Wire, 90 Degree Angled Male Plug, 16 AWG Grounded Wire (13A 125V 1625W), ETL Listed, White Cable with 25 Cable Ties
AC WORKS 100ft NEMA L14-30 Cord 100-ft 10 / 4-Prong Indoor/Outdoor Soow Heavy Duty Locking Extension Cord in the Extension Cords department at Lowes.com
parkworld 50 ft. 10/4 STW 30 Amp 4-prong Dryer Heavy-Duty NEMA 14-30 Extension Cord 886092 - The Home Depot
Power Strip 5 FT Extension Cord Flat Plug With 4 Outlets 3 USB Ports