kikirv 50amp 40ft welder extension cord 10 awg, 250v nema 6-50p to 6-50r heavy duty power extension cord for welder plasma mig tig cutter 40ft 10awg is up for auction in Tools & Home Improvement. The current bid is $20.00, 74% below the $77.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.