Kanayu Dryer Adapter Compatible with NEMA 10-30P to 14-30R, 3 Prong to 4 Prong Adapter Convert 10-30P Plug to 14-30R Receptacle, 220V 30 Amp 4P Newer Dryer to 3P Older House Adapter is up for auction in Appliances. The current bid is $2.00, 88% below the $17.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.