The new generation of thin-walled, flexible heat shrinkable tubes made of cross-linked polyolefin with a shrink ratio of 3:1 and packed in convenient storage containers. The main advantage is the ability to be used for shrinking on elements with a large difference in diameter. Additionally, five tubes of this type cover the range of diameters from 1.0 mm to 20.0 mm, which, when using tubes with a shrink ratio of 2:1, would require the use of 10 sizes. This can significantly reduce storage costs. • Basic electrical insulation• Color coding• Protection against corrosion and mechanical damage