This AC WORKS brand piggy-back adapter [PB1450620] is heavy-duty with a 1-foot length. This cord is a NEMA 14-50P and 14-50R to NEMA 6-20R. The NEMA 14-50P is a 50 Amp, 4-prong RV/generator/range male plug. The backside of this plug comes with a matching NEMA 14-50R connector. With this, you can use a variety of power solutions in addition to the female end. The female end of this cord is a NEMA 6-15/20R, 15/20 Amp, 250 Volt, T-blade connector. Using the piggy-back function, you can run multiple appliances from a NEMA 14-50 outlet, as long as it doesnt exceed 50 Amps. The cable is an STW, 10/3, 30 Amp copper wire with 600 Volt anti-cold weather cable staying flexible in extreme temperatures. The cord is super durable and typically used with residential applications, generators, and workshops. Included with your purchase is a 5-year limited warranty.