The PBL420 is an insulated band-style gas cylinder heater specifically designed to fit a 420 pound gas cylinder. The heater is built for use with 120 volts AC, drawing 3.33 amps thus producing 400 watts. It has a preset thermostat set for 90 F / 32 C ( 10 F / 5 C). The PBL420 band-style cylinder heaters allow you to draw propane at increased rates in cold weather conditions versus an unheated cylinder. You can run one band or add a second one further up the cylinder to improve the performance of the gas delivery system even more. This innovative heat-spreading technology insulates, protects and maintains heat to help you keep your pressure up and reduce the frequency of cylinder refills.Powerblanket Lite line is designed for heating jobs on a smaller scale. These models feature a lower power density than Powerblanket Industrial or Powerblanket Xtreme products. Rest assured that these heaters are the real deal! They are more efficient and safer than other heating elements on the market and certified to ETL, UL, CSA & CE safety standards. Keep your drums, barrels, buckets, pails & gas cylinder propane tanks warm in bitter climates so that you don't lose any production time, saving you both time and money.