●■Specifications Length: 25.4 ft (7 m) Maximum operating temperature: 396°F (180°C). Insulator: Silicone rubber Voltage (100V) Standard Power Consumption: 30W/m Heater outer diameter: 0.1 - 0.2 inches (3 - 4 Minimum winding diameter: 3 times more than the outer diameter of the heater Please use with a voltage regulator or temperature regulator. It is suitable for a wide range of heating areas such as soil and other areas