20Amp extension cord with NEMA 6-20R to NEMA 6-20P plug SJTW 12AWG 20Amp cable 250 volts, T blade female connector Power cord is Anti-Cold weather rubber which stays flexible in cold weather,The outer insulating cover is made of a higher quality elastomer rubber Ideal for air conditioner, portable heater, treadmill, CNC router, Tesla, EV charger and more UL Listed - This product is Listed to applicable UL Standards and requirements by UL,We guarantee good quality and Promise 12 month Warranty.