... 5.carbon, graphite,glasss,etc can be add Specifications:PTFE Tube Density: 2.1-2.3g/cm3 Temp resist: -180 ~ + ... at break: above 200%PTFE Tube PTFE TubeColor: White, Black etc. Physical Character: PTFE tube is made by plunger extrusion of ... PTFE has the best corrosion-resistance and dielectricity. Lead insulating sleeve, corrosion-resistant pipe, and corrosion-resistant insulating pipe for different ...