Packaging:25 meters       Buy heating wire 25 meters           Free: Wiring Accessories(4 pcs + 4 pcs)          This product is suitable for: warm heating, greenhouse vegetables, farm animals warm        Recommended length: 12.5 m (plus hot surface temperature: 75-80 degrees Celsius)       Product Name: carbon fiber wire       Insulating materials: (Polytetrafluoroethylene);        Temperature: 200 oC limit       Heating conductor: 24K       High voltage test: 3000V       Leakage current: 0.05mA / m       Rated voltage: 300V       Optional colors: Red       Diameter tolerance: 2.5 mm       Infrared wavelength: 8UM-18UM       Conductor resistance: 18.5 / M       Length: (custom, recommendation of not less than 10 meters))       Product power calculation:       Voltage * voltage / resistance = power       For example 1: 24K carbon fiber length of 10 meters       220V 220V / (10 m x 18.5 Ohm) = 260 watts       For example 2: 12K carbon fiber length of 15 meters       220V 220V / (15 m x 18.5 Ohm) = 175 watts               Power data can be seen using a heating line is long and the smaller the hotline       Product features:       With excellent heat resistance, at 160 oC can be used for a long time and almost no change in performance, sustainable use of 200 oC for 100000 hours.       Excellent insulation, insulation resistance is greater than 500M, the resistance is stable over temperature and a wide frequency range, excellent resistance to high voltage corona discharge and arc discharge.       Flame retardant and Zixi, because the contains no halide, heating not smoke or release, applicable to all kinds of fire strict situation.       Having good cold resistance and excellent medical rationalization.