Manufactured in china | Easy to use | Highly durable | Easy Heat pipe heating cable installs quickly and easily to keep water flowing | Includes grounded plug, built in thermostat, and instructions | Each cable consists of tough PVC inner insulation, a continuous ground braid, and weather-resistant PVC outer jacket | AHB units are activated and de-activated by an integral energy-saving thermostat | Approved for rigid plastic and metal pipe; UL listed | Easy Heat pipe heating cable installs quickly and easily to keep water flowing | Includes grounded plug, built in thermostat, and instructions | Each cable consists of tough PVC inner insulation, a continuous ground braid, and weather-resistant PVC outer jacket | AHB units are activated and de-activated by an integral energy-saving thermostat | Approved for rigid plastic and metal pipe; UL listed