RV 30 AMP 4-Prong Generator Adapter 30amp Male Plug to 50amp Female 14-50R 12" | eBay
Cleyean 3 Prong to 4 Prong Generator Plug Adapter Cord, Nema L5-30P Generator Male to Nema L14-30R Transfer Switch Female, 30Amp STW 10AWG 1.5FT : Amazon.ca: Patio, Lawn & Garden