Carbon fiber heating wire is produced by carbon fiber continuous yarn which is surrounded with plastic or rubber. It can generate far infrared ray which is wide used in health and beauty product. The following is the technical data of carbon fiber heating wire : Insulation resistance: above 3750V Far infrared vertical radiation: above 75%(in the range of 8 to 15µm) Electrothermal transfer efficiency: above 95% Dimensions: 0.8mm-3.6mm Wire electrical resistivity: 8Ω /m, 17Ω /m, 35Ω /m, 70Ω /m, 132Ω /m, 170Ω /m, 400Ω /m Insulant: PVC, TEFLON, Silicone Rubber , TPE