Happy Trails RV locking 20 amp Male to straight blade 30 amp female dogbone adapter (9514T) - Walmart.com
20/25ft Generator Extension Power Cord Copper Wire L14-30 30 Amp Power Inlet Box | eBay
1FT 30 Amp RV Piggy-Back Plug with 15/20 Amp Household Connector – AC Connectors
Amazon.com: Iron Forge Cable 10-30P to 6-20R EV Charger Adapter Cord, 1.5 Ft - 12/3 STW 30 Amp Male Plug to 20 Amp Female Receptacle : Tools & Home Improvement
30 Amp to 20 Amp RV Electrical Adapter Power Cord Surge Protection Box - iron forge tools
30 Amp to 20 Amp RV Electrical Adapter Power Cord Surge Protection Box - iron forge tools
Amazon.com: 12AWG Heavy Duty Extender AC Plug Adapter [4-in-1], 15 Amp Household to 20 Amp T Blade Power Extension Cord, 1FT/32CM 12AWG Nema 5-15P to 5-20R/6-15R/ 6-20R, 15A 125V to 20A 250V
parkworld 1 ft. 12/3 Household Regular 20 Amp 3-Prong 5-20P Plug to RV 30 Amp 3-Prong TT-30R Adapter Cord(NEMA 5-20P to TT-30R) 884852 - The Home Depot
AC WORKS 25 ft. SOOW 12/5 NEMA L21-20 20 Amp 3-Phase 120-Volt/208-Volt Industrial Rubber Extension Cord L2120PR-025E - The Home Depot
Southwire 3 ft. 10/3 STOW 30-Amp to 20-Amp Multi-Outlet (2) Major Appliance Y-Adapter Power Cord 19158802 - The Home Depot
Amazon.com: 1-FT 15 Amp Household AC Plug to 20 Amp T Blade Adapter Cable 12AWG Nema 5-15P to 5-20R,5-15P to 6-15R/20R 20-Amp to 15-Amp Plug-Adapter Cord,Heavy Duty 15A 125V to 20A 250V
Amazon.com: IRON FORGE CABLE 50 Amp to 20 Amp RV Electrical Adapter Power Cord with Surge Protection Box, 1.5 Ft - 10/4 STW 14-50P Male Plug to 4 5-20R Female Receptacles : Automotive