Specifications: Color: Red. Material: Carbon fiber. Product Name: Carbon fiber heating wire 100m. Insulating materials: Silicone rubber. Infrared wavelength: 8UM-18UM. Conductor resistance: 3310% / M. Heating conductor: 12K. High voltage test: 3000V. Maximum withstand temperature: 200. Leakage current: 0.05mA/m. Diameter: 3 MM. Length: 20/30/50/100/150/200 M. Conductor resistance: 33 / M. Product Power Calculation: Voltage * voltage / total resistance = power. For example: 12K carbon fiber, length of 10 meters. 220V 220V / (10 m x 33 Ohm) =150 watts. For example: 12K carbon fiber length of 15 meters. 220V 220V / (15 m x 33 Ohm) =100 watts. The data shows that the longer heating wire you use and the smaller output power. (The min length of 12K carbon fiber heating wire is 10 meters) Features: With excellent heat resistance. Dont need other transmission medium, the electrothermal conversion efficiency is above 98%. Excellent insulation.New infrared floor heating, make the temperature uniformity, promote blood circulation. Having good cold resistance and excellent medical rationalization. The carbon fiber heating wire cost little, and has a long life span,an investment, life-long, low maintenance costs. And etc. You can manually make heating equipment, electric blankets, car seat heater, heating appliances, animal heating system, heating system, etc. Suitable for farms, pig insulation board, jade bed, electric blanket, electric heating towel rack, footbath, rice cookers, pet pad, electric warm clothing, piping warm, ect. Package Contents: Buy 200m = 100m cable + 40 pcs copper tube + 40 pcs sleeves. or Buy 150m = 100m cable + 30 pcs copper tube + 30 pcs sleeves. or Buy 100m = 100m cable + 20 pcs copper tube + 20 pcs sleeves. or Buy 50m = 50m cable + 10 pcs copper tube + 10 pcs sleeves. or Buy 30m = 30m cable + 6 pcs copper tube + 6 pcs sleeves. or Buy 20m = 20m cable + 4 pcs copper tube + 4 pcs sleeves