Each type of shrinkable tube also has a different scope of application. Under the appropriate temperature, the heat shrinkable tube will shrink; when the temperature is not suitable or has not reached the temperature required by the shrinkable tube, the shrinkage will not occur. . The temperature range of the heat shrinkable tube is between -55°C and 125°C, 70°C is the initial temperature of the heat shrinkable tube, and 120°C is the complete shrinkage temperature when it is convenient to use. It is very convenient to heat and shrink, and the shrinking function can be performed by heating it with an oven or a hot air gun, and the shrinkable tube conforms to the national safety standard.