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