Round Power Cord Adapter (50A Straight Male x 30A Locking Female) by Arcon®. 1 Piece. Arcon 110 Volt Temporary Adapters adapt all brands of RV plugs. Made of durable UV protected PVC with solid brass contacts. Rubberized mold. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at an affordable cost.