In this category you can find a heat shrinkable tubing, also known as heat shrink. It is a shrinkable plastic tube when exposed to heat. This type of cable sleeve is used to insulate and seal wires, being many times better than insulating tape. Heat-shrink tubing provides high wear resistance and protection of insulated wires and connections from the environment. They are available in a variety of sizes and colors. Heat shrinkable tubing, usually made of nylon or polyolefin, shrinks radially, but not longitudinally when heated. It shrinks its diameter from 1/2 to 1/6, depending on the impurities in the material.