"This Powerblanket Pipe Heater Wrap is the easy way to thaw and protect pipes from freezing. Ideal for pipelines, oil fields, warehouses, valves and more. U.S.A. Watts 720, Color Black, Diameter in. 4, Amps 6, UL Listed Yes, Withstands Temperatures F Rated to -10F / -23C, CSA CSA compliant, Length ft. 10, Volts 120, Style Standard, Compatible With Copper, metal, poly pipe. Rapid Ramp technology accelerates initial heat-up time After pipe is heated/thawed, power consumption automatically reduces to prevent freezing"