ac works heavy duty durable extension cord (10ft nema 5-20 20a 125v) ac works this ac works brand extension cord [s520pr] is very durable. it comes in lengths of 10 feet and has a nema 5-20p to nema 5-20r. the cable is an sjtw, 12/3, indoor/outdoor cord. the 20 amp nema 5-20p is a straight-blade plug and the nema 5-15/20r is a straight t-blade connector with a power indicator on the end. this cable is anti-cold weather staying flexible in extreme temperatures. this product is ul listed and applicable to ul standards and requirements. included with your purchase is a 5-year limited warranty. nema 5-20p to nema 5-15/20r nema 5-20p, 20 amp straight-blade male plug nema 5-15/20r, 20 amp straight t-blade female connector 20 amp indoor/outdoor extension cord 5-year limited warranty