This AC WORKS brand generator protective power strip cord L1420CBF520 is very durable. The cord is 1.5-feet in length and is a NEMA L14-20P to 4 NEMA 5-15/20R household outlets. The NEMA 14-20P is a 20 Amp, 125/250 Volt straight-blade plug. The NEMA 5-15/20R is a 20 Amp, 125 Volt, T-blade household female connector. The cable is an STW, 10/4, 30 Amp copper wire with a 600 Volt anti-cold weather jacket that stays flexible in extreme temperatures. The cord is super durable and typically used with a generator, construction, and industrial equipment.