Green PTFE tubing withstands -45°F to 500°F. This hollow tubing has nominal 1.29mm (0.0508") outer diameter and an inner diameter of about 0.635mm (0.025"). Great for insulating wire leads of 22AWG size—typical resistors, capacitors, inductors with leads that are the diameter that plugs into breadboards. Supplied on a roll containing 12 feet.