This AC WORKS brand protective adapter L1430CB620 is a heavy-duty generator adapter cable. This 1-foot cord is a NEMA L14-30P to NEMA 6-15/20R. The NEMA L14-30P is a 30 Amp, 4-Prong generator plug. The NEMA 6-15/20R is a 15/20 Amp, T-blade, 250 Volt, female connector. The cable is an STW, 10/3, anti-cold weather cable staying flexible in extreme temperatures. The cord is super durable and typically used with generators, construction, and industrial equipment.